如何将C程序拆分为多个文件？ [英] How to split a C program into multiple files?

问题描述

我想在2个独立的.c文件中编写C函数，并使用我的IDE（代码：: Blocks）将所有内容一起编译。

I want to write my C functions in 2 separate .c files and use my IDE (Code::Blocks) to compile everything together.

如何设置

如何从另一个文件中调用一个 .c 文件中的函数文件？

How do I call functions in one .c file from within the other file?

推荐答案

通常，您应该在两个单独的 .c 个文件（例如 Ac 和 Bc ），然后将其原型放在相应的标头（ Ah ， Bh ，请记住包括警卫）。

In general, you should define the functions in the two separate .c files (say, A.c and B.c), and put their prototypes in the corresponding headers (A.h, B.h, remember the include guards).

无论何时在 .c 文件中，使用另一个 .c 中定义的函数，您将 #include 相应的标头；那么您将能够正常使用这些功能。

Whenever in a .c file you need to use the functions defined in another .c, you will #include the corresponding header; then you'll be able to use the functions normally.

所有 .c 和 .h 文件必须添加到您的项目中；如果IDE询问您是否必须对其进行编译，则应仅将 .c 标记为可编译。

All the .c and .h files must be added to your project; if the IDE asks you if they have to be compiled, you should mark only the .c for compilation.

快速示例：

Functions.h

Functions.h

#ifndef FUNCTIONS_H_INCLUDED
#define FUNCTIONS_H_INCLUDED
/* ^^ these are the include guards */

/* Prototypes for the functions */
/* Sums two ints */
int Sum(int a, int b);

#endif

Functions.c

Functions.c

/* In general it's good to include also the header of the current .c,
   to avoid repeating the prototypes */
#include "Functions.h"

int Sum(int a, int b)
{
    return a+b;
}

Main.c

Main.c

#include <stdio.h>
/* To use the functions defined in Functions.c I need to #include Functions.h */
#include "Functions.h"

int main(void)
{
    int a, b;
    printf("Insert two numbers: ");
    if(scanf("%d %d", &a, &b)!=2)
    {
        fputs("Invalid input", stderr);
        return 1;
    }
    printf("%d + %d = %d", a, b, Sum(a, b));
    return 0;
}

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