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byteflip.c
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C/C++ Source or Header
|
1990-09-16
|
614b
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35 lines
#include <stdio.h>
#define MAXWORD 32
main(argc, argv)
int argc;
char *argv[];
{
register int len;
int inmap[MAXWORD];
int outmap[MAXWORD];
char in[MAXWORD];
char out[MAXWORD];
register int i;
register int a;
a = 1;
len = atoi(argv[a++]);
if (len > MAXWORD)
abort(); /* kind of drastic... */
for (i = 0; i < len; i++)
inmap[i] = atoi(argv[a++]);
if (atoi(argv[a++]) != len)
abort();
for (i = 0; i < len; i++)
outmap[i] = atoi(argv[a++]);
while (fread(in, 1, len, stdin) == len) {
for (i = 0; i < len; i++)
out[outmap[i]] = in[inmap[i]];
fwrite(out, 1, len, stdout);
}
exit(0);
}