#include<stdio.h>


#define TRUE 1
#define FALSE 0


int main()
{
    int i, j, sign;
    char tmp[100]="";
    FILE *fp;
    FILE *fp_store;     //另创建文件，保存修改

    i = j = 0;
    sign = TRUE;

    fp = fopen( "file.txt", "r" );      //打开读取一个文件
    fp_store = fopen( "test.txt", "a" );    //以追加创建一个可写入的空文件  

    while( fgets( tmp, 100, fp ) != NULL )      //从file.txt中读取一行,最大100字符，存入tmp数组
    {
        for( i=0; i<100; i++ ){
            if( tmp[i]=='/' && tmp[i-1]=='/' ){  
                tmp[i-1] = '\n';        //判断，并使用，'\n','\0',清空'//'注释
                tmp[i] = '\0';
                break;
            }

            if( tmp[i] =='*' && tmp[i-1] == '/' ){
                tmp[i-1] = '\0';
                sign = FALSE;
                fputs( tmp, fp_store );
            }
            if( tmp[i] =='/' && tmp[i-1] == '*' ){
                tmp[i-1] = '\0';
                sign = TRUE;
            }
        }
        if( sign == TRUE ){
            fputs( tmp, fp_store );
        }
    }

    fclose( fp );
    fclose( fp_store );

    return 0;
}