diff --git a/AES_HPP.cpp b/AES_HPP.cpp
new file mode 100644
index 0000000..21f7bd2
--- /dev/null
+++ b/AES_HPP.cpp
@@ -0,0 +1,304 @@
+#include"AES_HPP.hpp"
+
+unsigned char S_BOX[256] =
+{
+    0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76,
+    0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0,
+    0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15,
+    0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75,
+    0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84,
+    0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF,
+    0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8,
+    0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2,
+    0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73,
+    0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB,
+    0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79,
+    0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08,
+    0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A,
+    0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E,
+    0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF,
+    0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16
+};
+unsigned char INV_S_BOX[256] =
+{
+    0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38, 0xBF, 0x40, 0xA3, 0x9E, 0x81, 0xF3, 0xD7, 0xFB,
+    0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87, 0x34, 0x8E, 0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB,
+    0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23, 0x3D, 0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E,
+    0x08, 0x2E, 0xA1, 0x66, 0x28, 0xD9, 0x24, 0xB2, 0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B, 0xD1, 0x25,
+    0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92,
+    0x6C, 0x70, 0x48, 0x50, 0xFD, 0xED, 0xB9, 0xDA, 0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D, 0x84,
+    0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A, 0xF7, 0xE4, 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06,
+    0xD0, 0x2C, 0x1E, 0x8F, 0xCA, 0x3F, 0x0F, 0x02, 0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B,
+    0x3A, 0x91, 0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA, 0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6, 0x73,
+    0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85, 0xE2, 0xF9, 0x37, 0xE8, 0x1C, 0x75, 0xDF, 0x6E,
+    0x47, 0xF1, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89, 0x6F, 0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B,
+    0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2, 0x79, 0x20, 0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4,
+    0x1F, 0xDD, 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31, 0xB1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xEC, 0x5F,
+    0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D, 0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF,
+    0xA0, 0xE0, 0x3B, 0x4D, 0xAE, 0x2A, 0xF5, 0xB0, 0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61,
+    0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26, 0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D
+};
+unsigned char RCON[11] = { 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36 };
+
+unsigned char Mix[4][4] = {
+0x02, 0x03, 0x01, 0x01,
+0x01, 0x02, 0x03, 0x01,
+0x01, 0x01, 0x02, 0x03,
+0x03, 0x01, 0x01, 0x02
+};
+
+unsigned char InvMix[4][4] = {
+0x0E, 0x0B, 0x0D, 0x09,
+0x09, 0x0E, 0x0B, 0x0D,
+0x0D, 0x09, 0x0E, 0x0B,
+0x0B, 0x0D, 0x09, 0x0E
+};
+
+
+void KeyScheduleCore(unsigned char roundNumber, const unsigned char KeyIn[4], unsigned char KeyOut[4]) {
+    memcpy(KeyOut, KeyIn, sizeof(KeyIn));
+    unsigned char tmp = KeyOut[0];
+    for (int i = 0; i < 3; i++) {
+        KeyOut[i] = KeyOut[i + 1];
+    }
+    KeyOut[3] = tmp;
+
+    for (int i = 0; i < 4; i++) {
+        KeyOut[i] = S_BOX[KeyOut[i]];
+    }
+
+    KeyOut[0] = KeyOut[0] ^ RCON[roundNumber];
+}
+
+void KeyExpansion(const unsigned char* key, unsigned char* ExpandKey) {
+    int KeyLength = 16;
+    int ExpandKeyLength = 176;
+    int Pre = 16;//to previous round key
+    //int m = 0;
+    //this four value is depanding on the size of the key. Now it is 128bit
+
+    for (int i = 0; i < 16; i++) {
+        ExpandKey[i] = key[i];
+    }
+
+    for (int i = KeyLength, rconIt = 1; i < ExpandKeyLength; rconIt++) {
+        unsigned char tmp[4];
+        memcpy(tmp, ExpandKey + i - 4, 4);
+        unsigned char g[4];
+        KeyScheduleCore(rconIt, tmp, g);
+
+        memcpy(tmp, ExpandKey + i - Pre, 4);
+        for (int j = 0; j < 4; j++) {
+            tmp[j] ^= g[j];
+        }
+
+        memcpy(ExpandKey + i, tmp, 4);
+        i += 4;
+
+        for (int j = 0; j < 3; j++) {
+            memcpy(tmp, ExpandKey + i - 4, 4);
+
+            for (int k = 0; k < 4; k++) {
+                ExpandKey[i + k] = tmp[k] ^ ExpandKey[i - Pre + k];
+            }
+            i += 4;
+        }
+
+        //如要支援其他大小的密鑰，還有其他東西要寫
+
+    }
+}
+
+void AddRoundKey(unsigned char state[4][4], const unsigned char RoundKey[4][4]) {
+    for (int i = 0; i < 4; i++) {
+        for (int j = 0; j < 4; j++) {
+            state[i][j] ^= RoundKey[i][j];
+        }
+    }
+}
+
+void SubBytes(unsigned char state[4][4]) {
+    for (int i = 0; i < 4; i++) {
+        for (int j = 0; j < 4; j++) {
+            state[i][j] = S_BOX[state[i][j]];
+        }
+    }
+}
+
+void ShiftRows(unsigned char state[4][4]) {//只有16個所以也可以直接寫對應
+    for (int i = 1; i <= 3; i++) {
+        unsigned char row[4];
+        for (int j = 0; j < 4; j++) {
+            row[j] = state[i][j];
+        }
+        for (int j = 0; j < 4; j++) {
+            state[i][(j - i + 4) % 4] = row[j];
+        }
+    }
+}
+
+void MixColumns(unsigned char state[4][4]) {
+    unsigned char tmp[4][4];
+    for (int i = 0; i < 4; i++) {
+        for (int j = 0; j < 4; j++) {
+            tmp[i][j] = state[i][j];
+        }
+    }
+    for (int i = 0; i < 4; i++) {
+        for (int j = 0; j < 4; j++) {
+            //乘換成擴展域的乘法，加換成擴展域的加法(XOR)
+            state[i][j] = G_Multi(Mix[i][0], tmp[0][j]) ^ G_Multi(Mix[i][1], tmp[1][j]) ^ G_Multi(Mix[i][2], tmp[2][j]) ^ G_Multi(Mix[i][3], tmp[3][j]);
+        }
+    }
+}
+
+void InvSubBytes(unsigned char state[4][4]) {
+    for (int i = 0; i < 4; i++) {
+        for (int j = 0; j < 4; j++) {
+            state[i][j] = INV_S_BOX[state[i][j]];
+        }
+    }
+}
+
+void InvShiftRows(unsigned char state[4][4]) {
+    for (int i = 1; i <= 3; i++) {
+        unsigned char row[4];
+        for (int j = 0; j < 4; j++) {
+            row[j] = state[i][j];
+        }
+        for (int j = 0; j < 4; j++) {
+            state[i][(i + j) % 4] = row[j];
+        }
+    }
+}
+
+
+void InvMixColumns(unsigned char state[4][4]) {
+    unsigned char tmp[4][4];
+    for (int i = 0; i < 4; i++) {
+        for (int j = 0; j < 4; j++) {
+            tmp[i][j] = state[i][j];
+        }
+    }
+    for (int i = 0; i < 4; i++) {
+        for (int j = 0; j < 4; j++) {
+            //乘換成擴展域的乘法，加換成擴展域的加法(XOR)
+            state[i][j] = G_Multi(InvMix[i][0], tmp[0][j]) ^ G_Multi(InvMix[i][1], tmp[1][j]) ^ G_Multi(InvMix[i][2], tmp[2][j]) ^ G_Multi(InvMix[i][3], tmp[3][j]);
+        }
+    }
+}
+
+unsigned char G_Multi(unsigned char a, unsigned char b) {
+    unsigned char result = 0;
+    for (int i = 0; i < 8; i++) {
+        if (a & 1) {
+            result ^= b;
+        }
+        bool IshHighBit1 = b & 0x80;
+        b <<= 1;//模擬乘上x(因為下次和a的高一次方運算)
+        if (IshHighBit1) {
+            b ^= 0x1B;//模擬除以(x^8 + x^4 + x^3 + x^1 + 1)，剛剛左移丟失的高位也剛好被除掉
+        }
+        a >>= 1;//將高一次方移到第一位
+    }
+    return result;
+}
+
+void encrypt(unsigned char* plaintext, unsigned char* key, unsigned char* output) {
+    unsigned char state[4][4];
+    //錯的->memcpy(state, plaintext, sizeof(plaintext));
+    for (int i = 0; i < 4; i++) {
+        for (int j = 0; j < 4; j++) {
+            state[i][j] = plaintext[i + j * 4];
+        }
+    }
+
+    constexpr int ExpandKeyLength = 176;//44*4
+    int RoundNums = 10;
+    //取決於密鑰大小
+
+    unsigned char ExpandKey[ExpandKeyLength];
+    KeyExpansion(key, ExpandKey);
+
+    unsigned char RoundKey[4][4];
+    for (int i = 0; i < 4; i++) {
+        for (int j = 0; j < 4; j++) {
+            RoundKey[i][j] = ExpandKey[j * 4 + i];
+        }
+    }
+
+    AddRoundKey(state, RoundKey);
+
+    for (int i = 1; i <= RoundNums; i++) {
+        for (int j = 0; j < 4; j++) {
+            for (int k = 0; k < 4; k++) {
+                RoundKey[j][k] = ExpandKey[i * 16 + k * 4 + j];
+            }
+        }
+
+        SubBytes(state);
+
+        ShiftRows(state);
+
+        if (i < RoundNums) {//最後一輪不用MixColunm
+            MixColumns(state);
+        }
+
+        AddRoundKey(state, RoundKey);
+    }
+    for (int i = 0; i < 4; i++) {
+        for (int j = 0; j < 4; j++) {
+            output[j * 4 + i] = state[i][j];
+        }
+    }
+    return;
+}
+
+void decrypt(unsigned char* ciphertext, unsigned char* key, unsigned char* output) {
+    unsigned char state[4][4];
+    //錯的->memcpy(state, ciphertext, sizeof(ciphertext));
+    for (int i = 0; i < 4; i++) {
+        for (int j = 0; j < 4; j++) {
+            state[i][j] = ciphertext[i + j * 4];
+        }
+    }
+
+    constexpr int ExpandKeyLength = 176;//44*4
+    int RoundNums = 10;
+    //取決於密鑰大小
+
+    unsigned char ExpandKey[ExpandKeyLength];
+    KeyExpansion(key, ExpandKey);
+
+    unsigned char RoundKey[4][4];
+    for (int i = RoundNums; i >= 1; i--) {
+        for (int j = 0; j < 4; j++) {
+            for (int k = 0; k < 4; k++) {
+                RoundKey[j][k] = ExpandKey[i * 16 + k * 4 + j];
+            }
+        }
+
+        AddRoundKey(state, RoundKey);
+
+        if (i < RoundNums) {
+            InvMixColumns(state);
+        }
+
+        InvShiftRows(state);
+
+        InvSubBytes(state);
+    }
+    for (int i = 0; i < 4; i++) {
+        for (int j = 0; j < 4; j++) {
+            RoundKey[i][j] = ExpandKey[j * 4 + i];
+        }
+    }
+
+    AddRoundKey(state, RoundKey);
+
+    for (int i = 0; i < 4; i++) {
+        for (int j = 0; j < 4; j++) {
+            output[j * 4 + i] = state[i][j];
+        }
+    }
+}
\ No newline at end of file
diff --git a/AES_HPP.hpp b/AES_HPP.hpp
new file mode 100644
index 0000000..c876eb5
--- /dev/null
+++ b/AES_HPP.hpp
@@ -0,0 +1,43 @@
+#ifndef AES_HPP
+#define AES_HPP
+
+#include<iostream>
+#include<cstring>
+#include<string>
+#include<iomanip>
+
+extern unsigned char S_BOX[256];
+
+extern unsigned char INV_S_BOX[256];
+
+extern unsigned char RCON[11];
+
+extern unsigned char Mix[4][4];
+
+extern unsigned char InvMix[4][4];
+
+void KeyExpansion(const unsigned char* key, unsigned char* ExpandKey);
+
+void KeyScheduleCore(unsigned char roundNumber, const unsigned char keyIn[4], unsigned char keyOut[4]);
+
+void AddRoundKey(unsigned char state[4][4], const unsigned char RoundKey[4][4]);
+
+void SubBytes(unsigned char state[4][4]);
+
+void ShiftRows(unsigned char state[4][4]);
+
+void MixColumns(unsigned char state[4][4]);
+
+void InvSubBytes(unsigned char state[4][4]);
+
+void InvShiftRows(unsigned char state[4][4]);
+
+void InvMixColumns(unsigned char state[4][4]);
+
+unsigned char G_Multi(unsigned char a, unsigned char b);
+
+void encrypt(unsigned char* plaintext, unsigned char* key, unsigned char* output);
+
+void decrypt(unsigned char* ciphertext, unsigned char* key, unsigned char* output);
+
+#endif // AES_HPP
\ No newline at end of file
diff --git a/Base64_HPP.cpp b/Base64_HPP.cpp
new file mode 100644
index 0000000..2384281
--- /dev/null
+++ b/Base64_HPP.cpp
@@ -0,0 +1,75 @@
+#include "Base64_HPP.hpp"
+using namespace std;
+int sBase64[64] = {
+    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
+    'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
+    'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
+    'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
+    'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
+    'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
+    'w', 'x', 'y', 'z', '0', '1', '2', '3',
+    '4', '5', '6', '7', '8', '9', '+', '/'
+};
+string Base64_encode(string str) {
+    int len = str.size();
+    string res;
+    res.resize((len + 2) / 3 * 4);
+    int j = 0;
+    for (int i = 0; i < len / 3 * 3; i += 3) {
+        int bits = ((str[i] & 0xff) << 16) | ((str[i + 1] & 0xff) << 8) | (str[i + 2] & 0xff);
+        res[j++] = sBase64[(bits >> 18) & 0x3f];
+        res[j++] = sBase64[(bits >> 12) & 0x3f];
+        res[j++] = sBase64[(bits >> 6) & 0x3f];
+        res[j++] = sBase64[bits & 0x3f];
+    }
+    if (len % 3 == 1) {
+        int bits = (str[len - 1] & 0xff) << 4;
+        res[j++] = sBase64[(bits >> 6) & 0x3f];
+        res[j++] = sBase64[bits & 0x3f];
+        res[j++] = '=';
+        res[j] = '=';
+    }
+    else if (len % 3 == 2) {
+        int bits = (str[len - 2] & 0xff) << 10 | (str[len - 1] & 0xff) << 2;
+        res[j++] = sBase64[(bits >> 12) & 0x3f];
+        res[j++] = sBase64[(bits >> 6) & 0x3f];
+        res[j++] = sBase64[bits & 0x3f];
+        res[j] = '=';
+    }
+    return res;
+}
+unsigned char BaseValue(char c) {
+    if (c > 'a' - 1) {
+        return c - 'a' + 26;
+    }
+    else if (c > 'A' - 1) {
+        return c - 'A';
+    }
+    else if (c > '0' - 1) {
+        return c - '0' + 52;
+    }
+    else if (c == '+') {
+        return 62;
+    }
+    else if (c == '/') {
+        return 63;
+    }
+    return -1;
+}
+string Base64_decode(string str) {
+    int len = str.size();
+    string res;
+    for (int i = 0; i < len - 4; i += 4) {
+        res.push_back((BaseValue(str[i]) << 2) | (BaseValue(str[i + 1]) >> 4));
+        res.push_back((BaseValue(str[i + 1]) << 4) | (BaseValue(str[i + 2]) >> 2));
+        res.push_back((BaseValue(str[i + 2]) << 6) | (BaseValue(str[i + 3])));
+    }
+    res.push_back((BaseValue(str[len - 4]) << 2) | (BaseValue(str[len - 3]) >> 4));
+    if (str[len - 2] != '=') {
+        res.push_back((BaseValue(str[len - 3]) << 4) | (BaseValue(str[len - 2]) >> 2));
+    }
+    if (str[len - 1] != '=') {
+        res.push_back((BaseValue(str[len - 2]) << 6) | (BaseValue(str[len - 1])));
+    }
+    return res;
+}
\ No newline at end of file
diff --git a/Base64_HPP.hpp b/Base64_HPP.hpp
new file mode 100644
index 0000000..8a93a56
--- /dev/null
+++ b/Base64_HPP.hpp
@@ -0,0 +1,17 @@
+#ifndef Base64_HPP
+#define Base64_HPP
+
+#include<iostream>
+#include<string>
+
+using namespace std;
+
+extern int sBase64[64];
+
+string Base64_encode(string str);
+
+unsigned char BaseValue(char c);
+
+string Base64_decode(string str);
+
+#endif // !Base64_HPP
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..46dbd88
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,90 @@
+#include"AES_HPP.hpp"
+#include"Base64_HPP.hpp"
+using namespace std;
+
+int main() {//g++ AES.cpp main.cpp -o program
+    
+    //shiftrow & invshiftrow & sub & Invsub 完成測試
+    while (1) {
+        cout << "此AES加密與解密程式只支援128位的密鑰\n要使用加密功能請輸入0，要使用解密功能請輸入1\n";
+        int en_or_de;
+        cin >> en_or_de;
+        if (!en_or_de) {//en
+            cout << "輸入的明文以字節儲存(就是常見的1byte儲存一個)的請輸入0" << '\n';
+            cout << "輸入的明文以Base64編碼的請輸入1(會先轉為字節儲存再加密)" << '\n';
+            int ch_or_ba;
+            cin >> ch_or_ba;
+
+            cout << "請輸入明文\n";
+            unsigned char plaintext[16];
+            string tmp;
+            cin.ignore();
+            getline(cin, tmp);
+            if (en_or_de) {
+                tmp = Base64_decode(tmp);
+            }
+
+            cout << "明文的16進位 ";
+            for (const auto& item : tmp) {
+                cout << hex << setw(2) << setfill('0') << (0xFF & static_cast<unsigned int>(item)) << ' ';
+            }cout << '\n';
+
+            for (int i = 0; i < 16; i++) { plaintext[i] = tmp[i]; }
+
+            cout << "請輸入密鑰(字節儲存128bit)\n";
+            unsigned char key[16];
+            getline(cin, tmp);
+            for (int i = 0; i < 16; i++) { key[i] = tmp[i]; }
+
+            unsigned char ciphertext[16];
+            encrypt(plaintext, key, ciphertext);
+
+
+            string tt;
+            tt.resize(16);
+            for (int i = 0; i < 16; i++) { tt[i] = ciphertext[i]; }
+            cout << "密文(16進位) ";
+            for (const auto& item : tt) {
+                cout << hex << setw(2) << setfill('0') << (0xFF & static_cast<unsigned int>(item)) << ' ';
+            }cout << '\n';
+
+            tt = Base64_encode(tt);
+            cout << tt << "\n\n";
+        }
+        else if (en_or_de) {//de
+            cout << "請輸入Base64編碼的密文\n";
+            unsigned char ciphertext[16];
+            string tmp;
+            cin.ignore();
+            getline(cin, tmp);
+            tmp = Base64_decode(tmp);
+
+            for (int i = 0; i < 16; i++) {
+                ciphertext[i] = tmp[i];
+            }
+            cout << "請輸入密鑰(字節儲存128bit)\n";
+            unsigned char key[16];
+            getline(cin, tmp);
+            for (int i = 0; i < 16; i++) {
+                key[i] = tmp[i];
+            }
+
+            unsigned char plaintext[16];
+            decrypt(ciphertext, key, plaintext);
+
+
+            string tt;
+            tt.resize(16);
+            for (int i = 0; i < 16; i++) {
+                tt[i] = plaintext[i];
+            }
+            for (const auto& item : tt) {
+                cout << hex << setw(2) << setfill('0') << (0xFF & static_cast<unsigned int>(item)) << ' ';
+            }cout << '\n';
+
+            for (int i = 0; i < 16; i++) {
+                cout << plaintext[i];
+            }cout << "\n\n";
+        }
+    }
+}
\ No newline at end of file