generatedata.cpp

来自「几个FFT算法」· C++ 代码 · 共 56 行

#include "stdafx.h"
#include "math.h"
#include "stdlib.h"
#include "windows.h"

#define DATA_FOLDER "E:\\lbc\\fftTest\\data\\"

double GetRandData()
{
	return (double)(rand() & 0xffff);
}
void generateDataFile(int len)
{
	char fileName[256];
	double t;
	int i;
	FILE *fp=NULL;
	//------------------------------
	sprintf(fileName,"%s%08d.dat",DATA_FOLDER,len);
	fp=fopen(fileName,"wb");
	if (fp==NULL)
		goto Err;
	//--------------
	
	for (i=0;i<len;i++)
	{
		t= GetRandData();
		fwrite(&t,sizeof(t),1,fp);
	}
Err:
	if (fp!=NULL)
	{
		fclose(fp);
		fp=NULL;
	}
}

void generateAllTestData(int k1,int k2)
{

	int i;
	
	srand(GetTickCount());
	for (i=k1;i<=k2;i*=2)
	{
		generateDataFile(i);
	}
}

int main(int argc, char* argv[])
{
	int k1=128;
	int k2=1048576;
	generateAllTestData(k1,k2);
	return 0;
}