C系列: 关于implicit declaration of function的warning

简介:

原文:http://justshare.iteye.com/blog/406463

用gcc编译c程序的时候 经常会出现 
implicit declaration of function '...' 的warning 

1  没有把函数所在的c文件生成.o目标文件; 
2  在函数所在的c文件中声明了,但是没有在调用它的.h或.c文件中声明; 
3  其头文件都声明过了,所调用的函数的原型与所传的实参类型不匹配. 

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