链接器错误:模块my.c中未定义符号_sum [英] linker error: undefined symbol _sum in module my.c

问题描述

当我使用Turbo C在库中添加用户定义的方法时，出现以下错误 链接器错误:undefined symbol _sum in module my.c 我正确地遵循了所有步骤:

I am getting following error when I add user defined method in library using turbo c linker error: undefined symbol _sum in module my.c I followed all steps properly:

 // 1. create addition.c containing function definatio and compile it

addition.c:

addition.c:

 addition(int i, int j)
  {
  int total;
 total = i + j;
 return total;
 }

第2步:

使用Alt + F9键(在Turbo C中)编译addition.c文件 将创建addition.obj文件，这是addition.c文件的编译形式.

Compile addition.c file by using Alt + F9 keys (in turbo C) addition.obj file would be created which is the compiled form of addition.c file.

第3步: 使用tlib

c:\> tlib math.lib + c:\ addition.obj

表示在数学库中添加c:\addition.obj文件.

Means adding c:\addition.obj file in the math library.

第4步: 创建文件addition.h&声明addition()函数的原型，如下所示.

Step 4: Created a file addition.h & declare prototype of addition() function like below.

 int addition (int i, int j);

现在包含功能addition原型的addition.h文件.

Now addition.h file containing prototype of function addition.

# include <stdio.h>
     // Including our user defined function.
     # include "c:\\addition.h"     
   int main ()
   {
   int total;
   // calling function from library
   total = addition (10, 20); 
   printf ("Total = %d \n", total);
    }

推荐答案

在编写此命令时，您需要指定Lib的完整路径以及您要添加到库中的模块. 去尝试一下 ！ 例如

While writtig this command you need to specify full path of Lib and your module u want to add to library. Just try it ! e.g.

Tlib d:\ turboc \ Lib \ CS.lib + d:\ turboc \ demo.obj

Tlib d:\turboc\Lib\CS.lib + d:\turboc\demo.obj

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