c程序--（指针）调用函数求两个数的和与差

#include <stdio.h>
#include <stdlib.h>

void sum_diff(float op1, float op2, float *psum ,float *pdiff) ;
int main()
{
    float data1 , data2 ,sum , diff,*psum ,*pdiff ;
    psum = &sum;
    pdiff = &diff ;
    scanf("%f%f",&data1,&data2);
    sum_diff(data1,data2 ,psum , pdiff);
   printf("The sum is %.0f\n The diff is %.0f\n",sum ,diff);
    return 0;
}
void sum_diff(float op1, float op2, float *psum ,float *pdiff)
{
      *psum = op1 + op2 ;
      *pdiff = op1 - op2;

}