c - 我应该在我的 C 代码中修复什么？

Question

首先我想说的是，我并不是在寻求答案，但是我想要一些关于我应该在语法中寻找什么的建议。这是我最初的几个 C 作业之一。我的代码的输出如下所示。

How many grade items would you like to enter?   4

Enter the grade for grade item number 1: 67
Enter the grade for grade item number 2: 79.4
Enter the grade for grade item number 3: 90
Enter the grade for grade item number 4: 83.5

Average grade: 79.97%
Letter grade: C

我正在尝试弄清楚如何使其复制输入的数字，但是我被困在为第一个作业编写的下面的代码上，并且我知道可以使用循环来使其变得更短但我只有大约一周的 C 使用经验。

#include <stdio.h>

int main() {
   int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, sum, total = 1200;
   float per;

   printf("\nEnter the score for Assignment 1: "); // Assignment statements
   scanf("%d", &a1);
   printf("\nEnter the score for Assignment 2: ");
   scanf("%d", &a2);   
   printf("\nEnter the score for Assignment 3: ");
   scanf("%d", &a3);   
   printf("\nEnter the score for Assignment 4: ");
   scanf("%d", &a4);
   printf("\nEnter the score for Assignment 5: ");
   scanf("%d", &a5);   
   printf("\nEnter the score for Assignment 6: ");
   scanf("%d", &a6);      
   printf("\nEnter the score for Assignment 7: ");
   scanf("%d", &a7);
   printf("\nEnter the score for Assignment 8: ");
   scanf("%d", &a8);   
   printf("\nEnter the score for Assignment 9: ");
   scanf("%d", &a9);   
   printf("\nEnter the score for Assignment 10: ");
   scanf("%d", &a10);
   printf("\nEnter the score for Assignment 11: ");
   scanf("%d", &a11);   
   printf("\nEnter the score for Assignment 12: ");
   scanf("%d", &a12);       

   sum = a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 + a9 + a10 + a11 + a12;

   per = (sum * 100) / total;
   printf("\nPercentage : %f", per);

    return (0);
}

任何建议都会很棒(或者我应该查看的内容的链接？)，在简单的打印/扫描语句后我会感到非常困惑。

Answer 1

您可以使用for循环输入多个值:

int a, sum = 0;
int n;
printf("\nHow many grade items would you like to enter? ");
scanf("%d", &n);
int i;
for (i = 1; i <= n; ++i) {
    printf("\nEnter the score for Assignment %d: ", i);
    scanf("%d", &a);
    sum = sum + a;
}
printf("\nsum: %d", sum);

现在，当您获得总和后，您就可以计算平均值了。年级等。

附注请注意，这里不欢迎诸如“修复我的代码”之类的问题。我知道学习 C 语言的第一步并不容易。阅读一些基础教程，运行其中的示例代码。并尝试将您的问题提出得更具体。