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using namespace std;#include <string>#include <iostream>#include <vector>unsigned char returnnextbyte(unsigned int b){int U4, L4;int Yl, Yh;int total;U4 = (b & 0xF0) >> 4;L4 = b & 0x0F;Yl = (L4 * 3) % 16;Yh = ( (3 * U4) + ((L4 * 5) % 16) + (int)((double)L4 / 5.01)) % 16;total = (Yh << 4) + Yl;return (unsigned char)total;}int main(int argc, char* argv[]){unsigned int i, x;unsigned int b;unsigned char nextbyte;string cmd;vector <unsigned int> myints;if (argc == 1){cout << "Usage: " << endl;cout << "decoder b1 b2 ... bn" << endl;cout << "b1 MUST correspond to ascii value 100" << endl;return 0;}else{x = strtol(argv[1], NULL, 16);b = (unsigned char)x ^ (unsigned char)100; // XORnextbyte = returnnextbyte(b);myints.push_back(100);for (i = 2; i < argc; i++){x = strtol(argv[i], NULL, 16);b = (unsigned char)x ^ (unsigned char)nextbyte;myints.push_back(b);nextbyte = returnnextbyte(nextbyte);}cout << endl;}for (i = 0; i < myints.size(); i++)cout << myints[i] << " ";cout << endl;// myints holds the decrypted commandreturn 0;}