#include 
     
      int doAdd(int a, int b)   { return a + b; }int doMinus(int a, int b) { return a - b; }int test(int a,int b,int (*suck)(int,int)) {
    return suck(a,b);}int main(void) {int (*my_func_ptr)(int, int);my_func_ptr = doAdd;printf("function pointer to doAdd => %d\n", (*my_func_ptr)(5, 3)); my_func_ptr = doMinus;printf("function pointer to doMinus => %d\n", (*my_func_ptr)(5, 3)); //other method claim function pointer   typedef int (*qq)(int,int);   qq funcArray[1];   funcArray[0] = doAdd;   funcArray[1] = &doMinus;   printf("%d\n" ,funcArray[0](5,3));   printf("%d\n" ,funcArray[1](5,3));      int i=0;   while(i<2) { printf("%d\n" ,funcArray[i](5,3)); i++;};      printf("%d\n",test(5,3,&doAdd));   printf("%d\n",test(5,3,doMinus));   return 0;} ref: