C Borland 编译器错误

Question

回到 Borland C 编译器的基础知识。我不断收到以下消息，这让我发疯，因为我找不到分号应该放在哪里或为什么要分号

>bcc32 -v- -w -O1 oddEven.c
Borland C++ 5.5.1 for Win32 Copyright (c) 1993, 2000 Borland
oddEven.c:
Error E2378 oddEven.c 16: For statement missing ; in function main()
*** 1 errors in Compile ***
>Exit code: 1

这是我的代码，感谢您的提前帮助

/* Program to check if a given integer between 1 and 100 is odd or even
 Date: 09/10/2015 */


#include <stdio.h>

main()
{
    int input;

    printf("\nPlease Enter A Number Between 1 and 100\n");
    scanf("%d", &input);
    printf("\nYou Entered %d\n", input);

    //for loop used for error handling
    for(input > 0 && input < 101)
    {

            if(input <= 0 && input > 100)

                {
                  printf("Error!! Please Enter A Number Between 1 and 100");

                 }//end if 1


            //modulo 2 to check for even divisibility 
            if(input % 2 == 0)
                {
                    printf("\n %d is EVEN", input);
                }//end if 2

            else
                {
                    printf("\n %d is ODD", input);
                }//end else

    }//end for loop

        getchar();
        getchar();

}//end main

Answer 1

这个:

for(input > 0 && input < 101)

是无效语法。应该是

while(input > 0 && input < 101)

但是你在输入任何有效的东西时都会有一个无限循环。它可能应该是 if，但是当用户输入无效数字时，不会打印任何错误消息。然后你应该移动

if(input <= 0 && input > 100)
{
    printf("Error!! Please Enter A Number Between 1 and 100");
}//end if 1

在 if 之外。

还有很多其他问题。我建议你读一本很好的 C 书。

固定代码:

/* Note how this code is indented and looks clean */

#include <stdio.h>

int main(void) /* Valid signature of main */
{
    int input, c; /* Note the extra variable */

    printf("\nPlease Enter A Number Between 1 and 100\n");
    scanf("%d", &input);

    printf("\nYou Entered %d\n", input);

    if(input <= 0 || input > 100) /* Note the use of || instead of && */
    {
        printf("Error!! Please Enter A Number Between 1 and 100 \n");
    }
    else /* Note the else */
    {
        if(input % 2 == 0)
        {
            printf("\n %d is EVEN \n", input);
        }
        else
        {
            printf("\n %d is ODD \n", input);
        }
    }

    while((c = getchar()) != '\n' && c != EOF); /* Clear the stdin */
    getchar(); /* Wait for a character */
}