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问题描述:
输入浮点数值 判断是否继续输入 输出N时候 退出for循环 计算出来 输入所有数字的平均值
运行结果：
[root@J01051386 C]# ./a.out
This program calculates the average of any number of values.
Enter a value:1
Do you want to enter another value?(Y or N):y
Enter a value:2
Do you want to enter another value?(Y or N):y
Enter a value:3
Do you want to enter another value?(Y or N):n
The average is 2.00
代码部分：
#include <stdio.h>
#include <ctype.h>
int main(void)
{
char answer = 'N';
double total = 0.0;
double value = 0.0;
unsigned int count = 0;
printf("\nThis program calculates the average of any number of values.");
//for 循环中的break 的使用
for (;;)
{
printf("\nEnter a value:");
scanf(" %lf",&value);
total += value;
++count;
printf("Do you want to enter another value?(Y or N):");
scanf(" %c",&answer);
if(tolower(answer) == 'n')
break;
}
printf("\nThe average is %.2lf\n",total/count);
return 0;
}