相关疑难解决方法(0)

在C的主要功能:

void main(int argc, char **argv)
{
   // do something here
}

In the command line, we will type any number for example 1 or 2 as input, but it will be treated as char array for the parameter of argv, but how to make sure the input is a number, in case people typed hello or c?

当我写这篇文章时,编译并运行:

int x;   
scanf ("%d", &x);  
while (x!=4) {  
    scanf ("%d", &x);  
}

当插入char或小于4的double数时,它进入一个无限循环.
当插入大于4的double时,它会终止.
任何解释？