c - While 循环在第一个循环后不接收数据

Question

我的代码有点问题。我在这里所做的基本上是使用 ASCII 进行输入验证，并且在没有 while 循环的情况下它可以正常工作，但是如果我使用 while 循环，它将完美运行一次，但是当它返回到代码顶部时，它会停止工作这意味着它假设所有内容都是无效输入。

    void menu()
            {
                char userInput[10] = {0};
                int asciiCode[10];
                int i;
                int countZero = 0;
                int storeUserOption;

                while (storeUserOption !=1 && storeUserOption !=2 && storeUserOption !=0)
{

                printf("\nPlease enter any of the following options:\n");
                printf("\nEnter winning number (w)\n");
                printf("\nEnter ticket numbers (t)\n");
                printf("\nquit (q)\n");
                printf("\n>: ");

               fgets(userInput, 10, stdin);

                /*It converts whatever I type in asciiData, and see if there's left over data*/
                for (i = 0; i < 10; i++)
                {
                    asciiCode[i] = userInput[i];
                    if (asciiCode[i] == 0)
                    {
                        countZero++;
                    }
                }


            /*It takes left over data and subtracts it by 10 to reSize it*/
                int reSize = (10 - countZero);

         /*It checks to see if you enetered anything more than 2 element if so it will input
            invalid input. For example can input dd, but can't input asdadasdasd*/
                if (reSize > 2)
                {
                    printf("Invalid Input1.");
                }

           /*If there's two elements left inside the array*/
                else if (reSize  == 2)
                    {
                        if (asciiCode[0] == 119)
                        {
                            printf("You have entered w");
                            storeUserOption = 1;
                        }

                        else if (asciiCode[0] == 116)
                        {
                           printf("You have entered t");
                            storeUserOption = 2;
                        }

                        else if (asciiCode[0] == 113)
                        {
                             printf("You have entered q");
                              storeUserOption = 0;
                        }

                        else{
                             printf("Invalid Input.");

                        }
                }
}

            }

Answer 1

您需要在 while 循环开始时重新启动变量。

int storeUserOption = 100; // needs to be something so it enters your while loop

While( ... ) {
                char userInput[10] = {0};
                int asciiCode[10];
                int i;
                int countZero = 0;



}