splitfile.cpp

本程序可以将大的文本文档分割成N个小文档。

#include<iostream.h>
#include<math.h>
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<conio.h>


#define MaxDataNum   10000000


void ReadData(char filein[100])
{
	int TriaNum,PlanePlantNum,LeafRank;
	float Sunfleck,sarea;
	FILE *fpin,*fpout;
	char fileout[100];
	fpin=fopen(filein,"r");
	if(feof(fpin)) {printf("file not open in readdata");}


	
	int i,j;
	int BeforeFile=0;
	char filenum[20];
	i=0;j=0;
	while(1)
	{
		fscanf(fpin,"%d",&TriaNum);
		if(feof(fpin)) break;

		fscanf(fpin,"%d %d %f %f",&PlanePlantNum,&LeafRank,&Sunfleck,&sarea);
	//	printf("%d %d %d %f %f\n",TriaNum,PlanePlantNum,LeafRank,Sunfleck,sarea);

		i++;

		j=int(i/600);

		if(j==0) 
		{
		//	if(i==508) 

		//	{getch();}
				_itoa(j,filenum,10);
				strcpy(fileout,"");
				strcpy(fileout,filenum);
				strcat(fileout,".txt");
				fpout=fopen(fileout,"a+");
				BeforeFile=j;
		}
		if(BeforeFile!=j)
		{
			fclose(fpout);
			_itoa(j,filenum,10);
			strcpy(fileout,"");
			strcpy(fileout,filenum);
			strcat(fileout,".txt");

			fpout=fopen(fileout,"a+");
			BeforeFile=j;
		}

		fprintf(fpout,"%d %d %d %f %f\n",TriaNum,PlanePlantNum,LeafRank,Sunfleck,sarea);
		printf("%d %d %d %f %f\n",TriaNum,PlanePlantNum,LeafRank,Sunfleck,sarea);
	
	//	BeforeFile=j;

	}

	fclose(fpout);
	fclose(fpin);
}

void main(void) 
{

	ReadData("a.txt");

}