c - 对 C 代码中的多个位置使用相同的函数

Question

如何为继续或停止创建单独的函数，因此可以随时引用那里。下面不是一个正确的 C，只是一个要实现的想法

main()
    do{ 
        request for input...
          if found invalid, Continue or stop?
           ...
        After one complete run
           ask again for Continue or stop?
           ...
    }while(Continue)

我已经尝试过这个，但是来自 feed,Continue 的值无法传递到主函数。我的逻辑有问题吗？或者有更简单的方法可以做到这一点。

struct Ans {
    int Continue;
    int Stop;
    char choice;
};

struct Ans feed ;
void YesNo(){
    int p=1;
    int q=2;
    char choice;
    feed.Continue=0;
    feed.Stop=0;
    while (feed.Continue==0)
    {
        printf("\nDo you wish to try again (Type Y to continue Q to quit:");
        scanf(" %c", &choice);
        choice = toupper(choice);
        if(choice == 'Y')
        {
            feed. Continue = p;
            return;

        }
        else if(choice=='Q') {

            feed.Stop = q;
            return;
        }

        else
        {
            printf("\nError: Invalid choice\n");
            do
            {
                feed.choice = getchar();

            } while (feed.choice != '\n' && feed.choice != EOF);
        }
    }

}
void main{        
Loop:do{
    printf("Please enter(k):\n");
    scanf("%d",&k);
    struct Ans feed;
    char str[N];
    if (fgets(str, sizeof str, stdin))
    {
        flag = 0;

            long value;
            char *check; 

            value = strtol(str, &check, 0);

            if (!isspace(*check) && *check != 0) flag = 1;
            {
                printf("\nInvalid Input\n");

            }

            while ( flag == 1)
            {
                YesNo();
                flag = 0;
                {
                    if (feed.Continue) {
                        goto Loop;
                    }
                    else if (feed.Stop) exit(0);
                }
            }

        }

        if ((k<0)||(k>N-1)) {
            printf("Input value out of range");
        }
        YesNo();
        {
            if (feed.Continue) {
                goto Loop;
            }
            else if (feed.Stop) exit(0);

        }



        //run something

        do{
            printf("\nDo you wish to try again (Type Y to continue Q to quit:");
            scanf(" %c", &choice);
            choice = toupper(choice);
        }while((choice != 'Y') &&  (choice != 'Q'));

    }while(choice == 'Y');

        return ;
    }

}

Answer 1

您可以将ContinueOrStop函数放在main函数之外，然后在需要时在main函数中调用

void ContinueORStop()
{
  do{ 
        request for input...
          if found invalid, Continue or stop?
           ...
        After one complete run
           ask again for Continue or stop?
           ...
    }while(Continue)
}

main()
{
  ContinueOrStop();
}