Question

我是《科索沃法典》的新篇章,而我是《塞浦路斯法典》的正文。我正试图实施一个简单的用户投入方案,能够增加2个数字。终端窗口给我带来0%的结果,我无法确定原因。我现在要记住的是,编码是怎样的。我使用的方法比我可能要多,但我只是试图击.。我有一个MacBook Pro,如果这对我取得这一令人ir慕的结果有什么影响。我将下面列出该守则,并列入我拍摄的屏幕。感谢你们的帮助!

#include <iostream>
#include <cmath>
#include <math.h>
#include <iomanip>
using namespace std;
int x = 0;
int y = 0;
int z;
int main(){
    cout << "We re going to multiply 2 numbers:" <<  /n ;
    cout << "Input a number: ";
    std::cin >> x;
    std::cout << "Input a number: ";
    cin >> y;
    z = x * y;
    std::cout << "Hello World! Your result is: " << z;
    return (0);
}

终端窗口显示:

cd "/Users/sgette/Documents/C++ Projects/.vscode/" && g++ math.cpp -o math &&       "/Users/sgette/Documents/C++ Projects/.vscode/"math
sgette@Scotts-MacBook-Pro C++ Projects % cd "/Users/sgette/Documents/C++ Projects/.vscode/"     && g+
+ math.cpp -o math && "/Users/sgette/Documents/C++ Projects/.vscode/"math
Input a number: 8
Input a number: 9
Hello World! Did you know that89is: 0%

Multiplication给我在终端窗口上的0%。

Answer 1

@G3773 It looks like the issue in your code is with the line: cout << "We re going to multiply 2 numbers:" << /n ; and return (0)

You are using the character literal /n which should be to represent a newline character. Replace that line with:

cout << "We re going to multiply 2 numbers:" << ; , return 0

正确的法典是:

#include <iostream>
#include <cmath>
#include <math.h>
#include <iomanip>

using namespace std;

int x = 0;
int y = 0;
int z;

int main() {
    cout << "We re going to multiply 2 numbers:" <<  
 ;
    cout << "Input a number: ";
    cin >> x;
    cout << "Input a number: ";
    cin >> y;
    z = x * y;
    cout << "Hello World! Your result is: " << z;
    return 0;
}

Hope to be helpful for your understanding.

Answer 2

Your code was mostly right. But, for one, you don t need all the imported math libraries. You are not doing any mathematical operations that need them. Second, why are the variable declarations outside of the main function?

#include <iostream>
#include <iomanip>

using namespace std;

int main() {
    int x = 0, y = 0, z = 0;

    cout << "We re going to multiply 2 numbers:
";
    cout << "Input a number: ";
    cin >> x;
    cout << "Input another number: ";
    cin >> y;
    
    z = x * y;
    cout << "Hello World! Your result is: " << z <<  
 ;
    return 0;
}

之后,你应当:

> % g++ math.cpp 
> % ./a.out 
> We re going to multiply 2 numbers: 
>Input a number:
> 8 
> Input another number: 
> 9 
> Hello World! Your result is: 72

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