Question

编写程序读入3个双精度数然后计算平均值结果四舍五入

Answer 1

VC程序如下：
#include<stdio.h>
main()
{
double a,b,c,ave;
printf("请输入三个双精度数：\n\n");
scanf("%f,%f,%f，&a,&b,&c);
printf("三数的平均数为：\n");
ave=(a+b+c)/3.0;
printf("%5.1f",ave);
}

Answer 2

晕不好意思我忘了要输入3个数了，给我加分哈～
用三个textBox
Dim a,b,c,d As Double(几位精度你决定，双精度你就小数点后面两位)
Dim intAverage As Integer
a=CDbl(TextBox1.text)
b=CDbl(TextBox2.text)
c=CDbl(TextBox3.text)
d=(a+b+c)/3
intAverage=Cint(d)
label1.text=intAverage.ToString

Answer 3

C语言
#include<stdio.h>
main()
{
double a,b,c,ave;
scanf("%lf,%lf,%lf",&a,&b,&c);
ave=(a+b+c)/3.0;
printf("%.2f",ave);
}