c语言简单实现文件 r/w 操作方法

#include<stdio.h>

//1.创建一个文件file 
FILE* createFile(const char* path)
{
	FILE* file = fopen(path,"w");
	return file;
} 

//2. 把buffer中的内容写入file 
void fileWrite(FILE* file)
{
	const char *buffer = "aabbccddeeff";
    size_t len = fwrite(buffer,1,12,file);
	if(len > 0)
	{
		printf("write to file sucess! %zu\n", len);
		fclose(file);
	}
}

//3.把刚才写过的文件内容读到ch中
void fileRead(const char* path)
{
	FILE* file_writed = fopen(path,"r");
	char ch[20]={0};
	size_t len = fread(ch, 1, 12, file_writed);
	if(len>0)
	{
		printf("read data size: %zu\n", len);
		printf("read data: %s\n", ch);
		fclose(file_writed);	
	}
}


int main()
{
	FILE* file = createFile("./test.txt");
	if(file)
	{
		printf("create file sucess!\n");
	}
	
	fileWrite(file);
	
	fileRead("./test.txt");
	
	return 0;
} 

create file sucess!
write to file sucess! 12
read data size: 12
read data: aabbccddeeff

--------------------------------
Process exited after 0.0432 seconds with return value 0
请按任意键继续. . .