#include<stdio.h>

int main(void)

{

void sum_diff(float op1,float op2,float *psum,float *pdiff);

float psum,pdiff;

float op1,op2;

//輸入op1，op2，並且是float,所以用%f；

printf("輸入：");

scanf("%f%f",&op1,&op2);

//呼叫自定義函式；

sum_diff(op1,op2,&psum,&pdiff);

printf("*psum=%f,*pdiff=%f",psum,pdiff);

return 0;

}

//已經使用了指標指示結果。所以不需要返回值。

void sum_diff(float op1,float op2,float *psum,float *pdiff)

{

*psum=op1+op2;

*pdiff=op1-op2;

}