#include #include int main(int argc, char **argv) { if(argc<3) { fprintf(stderr, "Usage: %s \n", argv[0]); return 1; } FILE *in, *out; if((in=fopen(argv[1], "rb"))==NULL) { perror("Could not open input file"); return 1; } if((out=fopen(argv[2], "wb"))==NULL) { perror("Could not open output file"); return 1; } while(1) { uint8_t c=fgetc(in); if(feof(in))break; if(c>=1 && c<=43) { c+=212; } fputc(c, out); } fclose(out); fclose(in); return 0; }