Шифрование текста

#include <iostream>
 
using namespace std;
 
int main()
{
    char str[] = "qwe";   // "пример"
    char key[] = "a2c";  // "пример"
 
    for(int i=0; i<3; i++)
       str[i] = str[i]^key[i];
        cout << str;
 
    return 0;
}

#include <iostream>
#include <string>
#include <cstdlib>
#include <cmath>
#include <windows.h>
#include <conio.h>
#include <stdio.h>
using namespace std;
main()
{(0, "");*input, *output; int reglen=17, buflen=1000, inpathlen=1001, outpathlen=1001;reg[reglen], regbuf, buffer[buflen], i, j, counter=0;inpath[inpathlen], outpath[outpathlen], 
c;("Ââåäèòå ïóòü ê ôàéëó, êîòîðûé áóäåò çàøèôðîâàí (äî 1000 ñèìâîëîâ):\n");
for (i=0; i<inpathlen; i++)
{[i]=getche();(inpath[i]==13) {break;};
};[i]='\0';("\n Ââåäèòå ïóòü õðàíåíèÿ çàøèôðîâàííîãî ôàéëà (äî 1000 ñèìâîëîâ):\n");
for (i=0; i<outpathlen; i++)
{[i]=getche();(outpath[i]==13) {break;};
};[i]='\0';=fopen(inpath, "r");=fopen(outpath, "a+");(input==NULL)
{("\n Îøèáêà ïðè îòêðûòèè ôàéëà");
}if (output==NULL)
{("\n Îøèáêà ïðè ñîçäàíèè ôàéëà");
}
{("\n\n Ââåäèòå êëþ÷ èç 17 ñèìâîëîâ (â êîíöå ââîäà íàæìèòå Enter):\n");
for (i=0; i<reglen; i++)
{=getche();[i]=static_cast<int>(c);(i==reglen-1) {break;};
};("\n Èä¸ò îáðàáîòêà ôàéëà...");
for (i=0; i<buflen; i++)
{(!feof(input)) {fscanf(input, "%c", &buffer[i]); counter++;};
};(i=0; i<counter; i++)
{[i]=buffer[i]^reg[0];=reg[0]^reg[1]^reg[2]^reg[3]^reg[7]^reg[12]^reg[14];(j=0; j<reglen; j++)
{[j]=reg[j+1];
};[reglen]=regbuf;
};(i=0; i<counter-1; i++)
{(output, "%c", buffer[i]);
};
};("\n Âûïîëíåíî.");();();
};