c - 'while' 循环求 n 个数字的总和

Question

我试图n使用while循环找到数字的总和，以便它像这样运行：

How many numbers: 3

-3,
4,
13,
The sum is: 14

但是我得到的是：

How many numbers: 3

2,
1,
The sum is: 3

我不明白，因为我设置i = 0

#include <stdio.h>

int main(void)  {

    int numbers; 
    printf("How many numbers: ");
    scanf("%d", &numbers);
    
    int sum = 0; 
    int i = 0; 
    while (i < numbers) {
        scanf("%d", &numbers);
        sum = sum + numbers; 
        i++; 
    }
    
    printf("The sum is: %d", sum);
    return 0;
}

标签： cwhile-loop

Answer 1

一个正确的解决方案是：

    #include <stdio.h>
    
    int main(void)  {
    
        int numbers; 
        printf("How many numbers: ");
        scanf("%d", &numbers);
        
        int sum = 0; 
        int i = 0; 
        int number; // use different variable for the input numbers
        while (i < numbers) {
            scanf("%d", &number);
            sum = sum + number; 
            i++; 
        }
        
        printf("The sum is: %d", sum);
        return 0;
   }

问题是您将一个变量用于两件不同的事情。