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- #include <stdio.h>
- #include <stdint.h>
- int main(int argc, char **argv) {
- if(argc<3) {
- fprintf(stderr, "Usage: %s <infile> <outfile>\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;
- }
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