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转自：http://www.iteye.com/problems/24480#include#define NULL 0 #define ASGN 1 #define MUL 2 int asgn(int* a, int b) { return *a = b; } int mul(int* a, int b) { return *a * b; } int (*func(int op))(int*, int) { switch (op) { case ASGN: return &asgn; case MUL: return &mul; } return NULL; } int main() { int i = 0xFEED, j = 0xBEEF; printf("%x\n", func(ASGN)(&i, j)); // beef printf("%x\n", func(MUL)(&i, j)); // 8e67a321 printf("%x, %x\n", i, j); // beef, beef return 0; }
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