Question

我正在创建一个程序，要求用户选择他们想要的品牌水以及他们想要送到家中的瓶子数量。程序使用while循环询问用户他们想要的瓶子数量是否正确，如果不是，循环将允许重新输入他们想要的数量。

每次我必须选择一个新的水品牌时，该计划一直有效;它以前坚持以前水品牌的细节。我无法在程序中看到while循环的问题。这是代码：

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int valuechange = 0;
    int correct = 0;
    int choice = 0;     
    int numofbottles;


    while (choice != 6)
    {
        printf("1. Buxton\n");
        printf("2. Evian\n");
        printf("3. Harrogate\n");
        printf("4. Power life\n");
        printf("5. Smart water\n");
        printf("6. Exit\n\n");
        printf("Enter your choice here: ");
        scanf("%d", &choice);
        /*each if statement has a while loop for if the user wants to re-enter a value of water bottles*/
        if (choice == 1)
        {
            while (correct != 1)
            {
                printf("Please choose how many bottles of Buxton you want to be delivered to your house:\n\n");
                scanf("%d", &numofbottles);

                printf("you have chosen %d bottles, is this the correct amount?\n(enter 1 for yes or 2 for no):\n\n", numofbottles);
                scanf("%d", &correct);
            }
            printf("Thank you, your order for %d Buxton bottles will be delivered to you\nwithin 3 working days.\n\n", numofbottles);
        }


        if (choice == 2)
        {
            while (correct != 1)
            {
                printf("Please choose how many Evian bottles  you want to be delivered to your house:\n\n");
                scanf("%d", &numofbottles);

                printf("you have chosen %d bottles, is this the correct amount?\n(enter 1 for yes or 2 for no):\n\n", numofbottles);
                scanf("%d", &correct);
            }
            printf("Thank you, your order for %d Evian bottles will be delivered to you\nwithin 3 working days.\n\n", numofbottles);
        }

        if (choice == 3)
        {
            while (correct != 1)
            {
                printf("Please choose how many Harrogate bottles  you want to be delivered to your house:\n");
                scanf("%d", &numofbottles);

                printf("you have chosen %d bottles, is this the correct amount?\n(enter 1 for yes or 2 for no):\n\n", numofbottles);
                scanf("%d", &correct);
            }
            printf("Thankyou, your order for %d Harrogate bottles will be deliver to you\nwithin 3 working days.\n\n", numofbottles);
        }


        if (choice == 4)
        {
            while (correct != 1)
            {
                printf("Please choose how many Powerlife bottles you want to be delivered to your house:\n\n");
                scanf("%d", &numofbottles);

                printf("you have chosen %d bottles, is this the correct amount?\n(enter 1 for yes of 2 for no):\n\n", numofbottles);
                scanf("%d", &correct);
            }
            printf("Thankyou, your order for %d Powerlife bottles will be deliver to you\nwithin 3 working days.\n\n", numofbottles);
        }

        if (choice == 5)
        {
            while (correct != 1)
            {
                printf("Please choose how many Smart water bottles you want to be delivered to your house:\n\n");
                scanf("%d", &numofbottles);

                printf("you have chosen %d bottles, is this the correct amount?\n(enter 1 for yes or 2 for no):\n\n", numofbottles);
                scanf("%d", &correct);
            }
            printf("Thankyou, your order for %d Smart water bottles will be deliver to you\nwithin 3 working days.\n\n", numofbottles);
        }
    }
    return 0;
}

Answer 1

一次迭代后，您不会重置correct。每次将其设置为0：

while (choice != 6)
{
correct = 0;
...
/*rest of the code */
}

顺便说一下，你有很多代码重复。您只需使用数组来存储瓶子类型并在循环中使用数组元素。

循环在C程序中重复先前输入的数据

1 个答案: