conflicting types for ‘getline’报错函数冲突

操作系统：rhel6

编译环境：gcc-4.4.4

源代码如下：

#include "stdio.h"

#define MAXLEN    1000    /*maximum characters of input length line*/
/*从输入的信息行内，找出最长的行，并且输出*/

main()
{
    int getline(char cur__line[],int max);
    void copy(char max_line[],char cur_line[]);
    int len,max;
    char cur_line[MAXLEN];    /*save the current lines*/
    char max_line[MAXLEN];    /*save the max maximum lines*/

    len=max=0;
    while((len=getline(cur_line,MAXLEN))>0)
        if(len>max){
            max=len;
            copy(max_line,cur_line);
        }
    if(max>0)    /*this line is exist*/
        printf("%s",max_line);
    return 0;
}
/*read a line into cur_line;    return length*/
int getline(char cur_line[],int max)
{
    int ch,count;

    printf("input a few lines:\n");
    for(count=0;count<max-1 && (ch=getchar())!='$' && ch!='\n';count++)
        *(cur_line+count)=ch;
    if(ch=='\n'){
        *(cur_line+count)=ch;
        count++;
    }
    *(cur_line+count)='\0';
    return count;
}
/*copy: copy 'from' into 'to' ;assume to is big enough*/
void copy(char to[],char from[])
{
    int count;

    for(count=0;(*(to+count)=*(from+count))!='\0';count++)
    ;
}

报错如下：

Press ENTER or type command to continue

读入文本行并输出最长行.c:7: error: conflicting types for ‘getline’

/usr/include/stdio.h:673: note: previous declaration of ‘getline’ was here

读入文本行并输出最长行.c:29: error: conflicting types for ‘getline’

/usr/include/stdio.h:673: note: previous declaration of ‘getline’ was here

报错原因：

在studio.h头文件内，已经包含了getline函数，而我们又重新定义了一个getline函数，所以会提示定义的函数冲突

处理方案：

将我们自己定义的函数改个名字，如get_line()，问题解决