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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* FIXME hacked together 6 months ago, not sure if finished */
/* FIXME does duplicates */
void swap_chr(char*, char*);
void p(char *, size_t);
int main(int argc, char **argv)
{
if (argc != 2)
{
fprintf(stderr, "Usage: %s <word>\n", argv[0]);
return EXIT_FAILURE;
}
p(argv[1], 0);
return 0;
}
void swap_chr(char *a, char *b) {
char t = *a;
*a = *b;
*b = t;
}
void p(char *string, size_t x)
{
size_t i = 0;
if (x == strlen(string)) {
puts(string);
return;
}
for (i = 0; i < strlen(string); i++) {
swap_chr(&string[x], &string[i]);
p(string, x + 1);
swap_chr(&string[x], &string[i]);
}
}
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