C程序无限期循环 [英] C program loops indefinitely

问题描述

当我运行我的程序，它要求无限的密码。我输入正确的密码，但它只是循环回来。有没有错误，而我是编译。要编译，我用：

When I run my program it asks for the password indefinitely. I enter the correct password but it simply loops back. There were no errors while I was compiling. To compile, I used:

gcc -ansi -W -Wall -pedantic -o prog myProgram.c
chmod +x prog

我运行Ubuntu信赖。下面是相关的密码code：

I am running ubuntu trusty. Here is the code related to the password:

char string[100] = "";

int main(void)
{
    char correctPassword[25] = "myPassword";
    char password[25] = "";

    system("clear");

    printf("Enter your password:\n");
    scanf("%s", password);

    if (password == correctPassword)
    {
        system("clear");
        printf("Enter a string:\n");
        scanf("%s", string);
    }
    else
    {
        system("clear");
        printf("Sorry, incorrect password\n");
        system("pause");
        main();
    }

更新code：

char string[100] = "";

int main(void)
{
    char correctPassword[25] = "myPassword";
    char password[25] = "";
    int ret;

    system("clear");

    printf("Enter your password:\n");
    scanf("%s", password);

    ret = strcmp(password, correctPassword);
    if (ret == 0)
    {
        system("clear");
        printf("Enter a string:\n");
        scanf("%s", string);
    }
    else
    {
        system("clear");
        printf("Sorry, incorrect password\n");
        system("pause");
        main();
    }
    return 0;
}

编辑2：我认为这是超越现在解决了，我怎么把它标记为这样

edit 2: i think this is beyond solved now, how do i mark it as such?

推荐答案

这行

if (password == correctPassword)

没有做什么，你认为它。它不是比较字符串，它是在比较每个字符串的第一个字符的存储器地址。如果要比较的字符串，你要使用的strcmp，你可以读到这里： HTTP： //www.tutorialspoint.com/ansi_c/c_strcmp.htm

修改为了应对在code修改;你有行

EDIT In response to the change in the code; you have the line

if(ret = 0)

您想

if(ret == 0)

我假设这是一个错字。

I'm assuming this is a typo.

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