编辑代码

#include <stdio.h>
#include <math.h>
int main()
{
    float x,y,z,sum;
    int num;
    printf("请输入三个实数，以,分隔:\n");
    scanf("%f,%f,%f",&x,&y,&z);
    printf("输入的三个实数为:%f,%f,%f",x,y,z);
    sum = x+y+z;
    num = round(sum);
    printf("三数之和为：%f\四舍五入后为：%d\n",sum,num);
    return 0;
}