C十一:fopen, fread,fwrite

#define _CRT_SECURE_NO_WARNINGS  
#include <stdio.h>  
#include <stdlib.h>  
#define DATA_SIZE 1024  

int writeTest(){
	unsigned int *dataPtr = NULL;  
    dataPtr = (unsigned int *)malloc(sizeof(int)*DATA_SIZE);  
    for(unsigned int i=0;i<DATA_SIZE;i++)  
    {  
        dataPtr[i] = i; //初始化缓存区 
    }  
    FILE *fp = fopen("test.txt","wb");  
    fwrite(dataPtr,sizeof(int),DATA_SIZE,fp);  
       fclose(fp);  
       free(dataPtr);  
    system("pause");  
    return 0; 
} 

int readTest(){
	FILE *fp = fopen("test.txt","rb");
	int temp;
	int res;
	while(1){
		res = fread(&temp,sizeof(int),1,fp);
		if (res == 1)
			printf("%d\n",temp);
		else
		    break;
		if(temp>200)
		  break;
	}
	
	fclose(fp);
	return 0;
}
  
int main()  
{  
     writeTest();
     readTest();
}