1. #include <stdio.h>
    3. int sum(int a , int b ){
    4.     return a + b;
    5. }
    7. int Psum(int(*sum)(int,int),int a ,int b)
    8. {
    9.     printf("%d ", sum(a,b));
    10.     return 0;
    11. }
    13. int main(int argc, char **argv){
    15.     Psum(sum,5,3);
    17. }