重拾C的文件操作

#include<stdio.h>
#include<stdlib.h>
#define SIZE 4
#define FILENAME "person"


struct person
{
	int id;
	char name[10];
};


int main()
{

	void copyContent(char inFileName[], char outFileName[]);
	void savePerson(struct person psons[], int size, char fileName[]);
	void readPerson(struct person psons[], int size, char fileName[]);
	
	
	char inFileName[] = "abc.txt";
	char outFileName[] = "abc2.txt";
	copyContent(inFileName, outFileName);
	
	
	int i, size = SIZE;
	char fileName[] = FILENAME;
	struct person psons[4];
	for(i = 0 ; i < size ; i ++ )
	{
		scanf("%d%s", &psons[i].id, psons[i].name)	;
	}
	savePerson(psons, size, fileName);
	
	
	struct person results[4];
	readPerson(results, size, fileName);
	for(i = 0 ; i < size ; i ++)
	{
		printf("%d %s\n", results[i].id, results[i].name);
	}
	

}

//copy file content
void copyContent(char inFileName[], char outFileName[])
{
	FILE *inFile, *outFile;
	char ch;
	if((inFile = fopen(inFileName, "r")) == NULL)
	{
		printf("Cannot open inFile\n");
		exit(0);
	}
	if((outFile = fopen(outFileName, "w")) == NULL)
	{
		printf("Cannot open outFile\n");
		exit(0);
	}
	while( ! feof(inFile))
	{
		ch = fgetc(inFile);
		fputc(ch, outFile);
		putchar(ch);
	}
	fclose(inFile);
	fclose(outFile);
}

//save struct content to file
void savePerson(struct person psons[], int size, char fileName[]) 
{
	FILE* fp;
	int i;
	if((fp = fopen(fileName, "wb")) == NULL)
	{
		printf("Cannot open file\n");
		exit(0);
	}
	for(i = 0 ; i < size ; i ++ ) 
	{
		if(fwrite(&psons[i], sizeof(struct person), 1, fp) != 1)
			printf("file write error.\n");
	}
	fclose(fp);
}

//read struct content from file
void readPerson(struct person psons[], int size, char fileName[])
{
	FILE* fp;
	int i;
	if((fp = fopen(fileName, "rb")) == NULL)
	{
		printf("Cannot open file\n");
		exit(0);
	}
	for(i = 0 ; i < size ; i ++ )
	{
		if(fread(&psons[i], sizeof(struct person), 1, fp) != 1)
			printf("Cannot open file\n");
	}
	fclose(fp);
}