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