分割文件，并写入文件中 把mb1.txt分割在按照不同类别的文件中，一共有10个文件

#include <iostream>
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
using namespace std;
#define Malloc(type,n) (type *)malloc((n)*sizeof(type))
static int max_line_len = 1024;
static char* line = NULL;
int len;
char *ReadLine(FILE * input)
{
if(fgets(line,max_line_len,input) == NULL)
return NULL;
while(strrchr(line, '\n') == NULL)
{
max_line_len *= 2;
line = (char *) realloc(line, max_line_len);
len = (int) strlen(line);//空余的内存...
if(fgets(line + len, max_line_len - len, input) == NULL)
break;
}
return line;
}
static char *filetype = ".txt";
int main(int argc, char ** argv)
{
assert(argc == 2); // use bool expression or equal = ?
char *fileName = argv[1];
cout<<fileName<<endl;
FILE *source;
source = fopen(fileName,"r");
line = Malloc(char,max_line_len);
int count = 0;
ReadLine(source);
while (ReadLine(source)!=NULL)
{
char *label = strtok(line, " \t\n"); // label
if (label == NULL)
{
return false;
}
char *endptr;
int Class = strtod(label, &endptr);
if (endptr == label || *endptr != '\0')
{
return false;
}

char *dstfile = Malloc(char,strlen(label)+strlen(filetype)+1);
strcpy(dstfile,label);
strcat(dstfile,filetype);


FILE *outfile = fopen(dstfile,"a");// 增补, 如果文件不存在则创建一个
cout<<dstfile<<endl;
if(outfile==NULL)
{
return false;
}
strtok(NULL, " \t");
fprintf(outfile,"%d\t",Class);
fprintf(outfile,"%s\n",strtok(NULL,"\n"));
}
fclose(source);
cout<<"all files are created , line is "<<endl; //这里可以统计有多少行呦
}