Question

我需要编写一个程序，从键盘读取数字，计算数字的平均值，然后显示它。数字序列将以零结束。

这是我的代码：

#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
int main()
{
    int count;
    double number, sum, average;

    count = 0;
    sum = 0;
    average = 0;

    cout << "\nEnter Number (0 to terminate): ";
    cin >> number;

    while(number! = 0.0)
    {
        sum = sum + number;
        count = count + 1;
        cout << "\nEnter Number: ";
        cin >> number;
    }
    if(count! = 0.0);
    {
        average = sum/count;
    }

    cout << "\nThe average of the" << count << "number is" << average << endl;
    return 0;
}

然而，我遇到两个错误：

预期'）'

和

if语句有空体

Answer 1

if(count! = 0.0);

摆脱分号

Answer 2

有三个错误：

!=运算符在两个地方拼写错误! =。
if在右括号后面有分号。

Answer 3

if语句后面有一个分号（;）。删除它：）

if(count! = 0.0)

Answer 4

while(number! = 0.0)应为while(number != 0.0)

和

if(count! = 0.0)应为if(count != 0.0)

注意!=是运营商，但! =不是 - 注意细节！

Answer 5

请不要在比较器之间插入任何空格。

你写了(number! = 0.0)，但正确的应该是：(number != 0.0)。

#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
int main()
{
    int count;
    double number, sum, average;

    count = 0;
    sum = 0;
    average = 0;

    cout << "\nEnter Number (0 to terminate): ";
    cin >> number;

    while(number != 0.0)
    {
        sum = sum + number;
        count = count + 1;
        cout << "\nEnter Number: ";
        cin >> number;
    }
    if(count != 0.0)
    {
        average = sum/count;
    }

    cout << "\nThe average of the" << count << "number is" << average << endl;
    return 0;
}

而且＆amp;如果循环预期错误

5 个答案: