CODE: int main(int argc, char *argv[])
{
FILE *t,*s;
char ch;
if((s = fopen(argv[1],"r")) == NULL || (t = fopen(argv[2],"w")) == NULL){system("pause");exit(1);}
while((ch = getc(s)) != EOF){putc(~ch,t);}
fclose(s);
fclose(t);
return 0;
} how to use :
open cmd.exe , go to where is pro and type
start mypro.exe yourtextIN.txt yourtextOUT.txt
Enjoy 
