c - 函数循环

Question

我正在编写一个函数来验证用户插入的数字(1 到 3 之间)，无论我输入什么数字，程序都会崩溃。

这是我的代码:

    int validate(int low, int high) {
    int selection;

    do {
    scanf("%d", selection);
    if (selection < low || selection > high)
        printf("Invalid Input, try again: ");
    } while (selection > low || selection < high);

    return selection;
}

请问大家有什么想法吗？

Answer 1

读取 scanf 时，将 & 与变量一起使用

 int validate(int low, int high) {
    int selection;
     printf("Enter your Selection ");
      do {
            scanf("%d", &selection);
            if (selection < low || selection > high)
           {
                printf("Invalid Input, try again: ");
          }
       } while (selection < low || selection > high) ;

        return selection;
    }