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#include <stdio.h>
#include <stdlib.h>
int doub(int);
int trip(int);
int half(int);
static int (*fpv[4])(int);
void fpv_exec(int (**)(int), int);
int doub(int i) {
return i * 2;
}
int trip(int i) {
return i * 3;
}
int half(int i) {
return i / 2;
}
static int (*fpv[4])(int) = {doub, trip, half, NULL};
void fpv_exec(int (**fpv)(int), int n) {
while (*fpv)
printf("%d\n", (*fpv++)(n));
}
int main(int argc, char **argv) {
for (argv++, argc--; argc; argv++, argc--)
fpv_exec(fpv, atoi(*argv));
exit(EXIT_SUCCESS);
}
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