Question

我正在为一个开始的C ++课程做家庭作业，我有点迷失这是作业：

创建一个c ++程序，要求用户输入一个数字。

程序的输出应为以下之一：您输入了偶数。要么您输入了一个ODD号码。

如果用户输入了ODD号码，请他们输入另一个号码。将此数字乘以第一个数字并输出结果。

偶数/奇数部分非常简单 - 我得到了那部分工作。我在第二部分完全失败了。我遇到了很多错误，我甚至无法弄清楚它的起点。如果有人能给我一个关于我做错的提示，我会非常感激。

#include <iostream>
using namespace std;

int main () {
        int num1; // This is the original number entered by the user.
        int num2; // This is the second number entered if the first number is odd.
        cout << "Enter a number: "<< endl;
        cin >> num1 >> endl;
        if (num1 % 2 == 0) {
                cout << num << " Your number is even." << endl;
}       if (num1 % 2 != 0) {
                cout << num1 << " Your number is odd. Please enter another number: “<< endl;
                cin >> num1 >> endl;
        } // end of if odd
        cout << " Your two numbers multiplied equals (num1 *= num2)” << endl;

} // end of main ()

Answer 1

#include <iostream>
using namespace std;

int main () {
    int num1; // This is the original number entered by the user.
    int num2; // This is the second number entered if the first number is odd.
    cout << "Enter a number: "<< endl;
    cin >> num1;
    if (num1 % 2 == 0) {
        cout << num1 << " Your number is even." << endl;
    }       
    else {
        cout << num1 << " Your number is odd. Please enter another number: " << endl;
        cin >> num2;
        cout << " Your two numbers multiplied equals " << num1*num2 << endl;
    } // end of if odd
    return 0;        
} // end of main ()

这是固定代码。您尝试cout << num，但没有num变量，应该是num1，cin >> endl也是错误的。

出乎意料的是，您最后的”不是"，而是其他内容，并且会产生很多错误。

Answer 2

奇数值的部分

if (num1 % 2 != 0) {
    cout << num1 << " Your number is odd. Please enter another number: “<< endl;
    cin >> num2 >> endl;
    cout << " Your two numbers multiplied equals:" << (num1 * num2) << endl;
            }

Answer 3

修正后

if (num1 % 2 != 0) {
cout << num1 << " Your number is odd. Please enter another number:"<< endl;
cin >> num2;
cout << " Your two numbers multiplied equals:" << (num1 * num2) << endl;
}

不要在配额标记之间放置公式。这会把它们变成不能按要求执行的字符串或字符。即cout << " Your two numbers multiplied equals (num1 *= num2)” << endl;

将语句cout << " Your two numbers multiplied equals (num1 *= num2)” << endl;放在if语句旁边会导致语句运行，即使该数字不是奇数。这不符合任务。并且num2为null仍会导致错误

如果初始输入是C ++中的奇数，则乘以两个整数

3 个答案: