c++ 入meng代码出错

[cxxlp]

#include <iostream.h>


int call_b(int);


void main(){


	int c = 20;
	int g = 0;
	g = call_b(c);
}   

int call_b(c){


	c = c+5;
	return c;


}

C:\Program Files\Microsoft Visual Studio\MyProjects\ddd\dddd.cpp(15) : error C2065: 'c' : undeclared identifier
C:\Program Files\Microsoft Visual Studio\MyProjects\ddd\dddd.cpp(15) : error C2448: '<Unknown>' : function-style initializer appears to be a function definition

刚学c++ 不知道是什么原因哦

[xylicon]

int call_b(c){


c = c+5;
return c;


}

应该改成

int call_b(int c){


    c = c+5;
    return c;


}

[cxxlp]

谢谢哦

[sunnywyg]

#include <iostream.h>


int call_b(int);


void main(){


    int c = 20;
    int g = 0;
    g = call_b(c);
}   

int call_b(c){     //这里的c未定义,你不告诉编译器它是什么类型的，谁知道呢  改成int c即可


    c = c+5;
    return c;


}