gendata.cpp

堆排序

#include <math.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <errno.h>

int main( void )
{
	int		rand_data;
	FILE *fp = NULL;

	if( (fp=fopen("indata","w")) == NULL )
	{
		fprintf( stderr, "fopen() error. strerror(errno)=%s\n", strerror(errno) );
		exit( -1 );
	}
	

	srand( time(NULL) );
	for( int i=0; i<1000000; i++ )
	{
		rand_data = rand();
		fprintf( fp, "%d\n", rand_data );
	}

	fclose( fp );

	return( 0 );
}