Exercise 8-2 Calculate the sum and difference of two numbers (10 points)

This question requires the realization of a simple function that calculates the sum and difference of the input two numbers.

Function interface definition:

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

The op1sum op2is the two real numbers entered, *psumand the sum *pdiffis the calculated sum and difference.

Sample referee test procedure:

#include <stdio.h>

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

int main()
{
    
    
    float a, b, sum, diff;

    scanf("%f %f", &a, &b);
    sum_diff(a, b, &sum, &diff);
    printf("The sum is %.2f\nThe diff is %.2f\n", sum, diff);

    return 0; 
}

/* 你的代码将被嵌在这里 */

Input sample:

4 6

Sample output:

The sum is 10.00
The diff is -2.00

answer:

void sum_diff( float op1, float op2, float *psum, float *pdiff )
{
    
    
/*  *pusm指向sum；*pdiff指向diff，已取得他们的内存地址，所以可以直接运算，值改变，相应的变量也会改变。*psum的值相当于sum的值    */
	*psum = op1 + op2;
	*pdiff = op1 - op2;
}