方法：

复制代码 代码如下:

long filesize(char* filename);

char* file_get_contents(char* filename);

void file_put_contents(char* filename, char* data);

示例：

复制代码 代码如下:

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

long filesize(char* filename);

char* file_get_contents(char* filename);

void file_put_contents(char* filename, char* data);

int main() {

printf("%sn", "----------------Begin---------------");

char* filename = "/tmp/tmp.txt";

file_put_contents(filename, "http://www.jb51.net");

char* data = file_get_contents(filename);

printf("Fd:: %sn", data);

printf("%sn", "----------------End-----------------");

return 0;

}

long filesize(char* filename) {

long length;

FILE* stream = fopen(filename, "rb");

if(!stream) return 0L;

fseek(stream, 0L, SEEK_END);

length = ftell(stream);

fclose(stream);

return length;

}

char* file_get_contents(char* filename) {

FILE* fp = fopen(filename, "rb");

if(!fp) {

printf("%sn", "The file can not be opened.");

exit(0);

}

long length = filesize(filename);

char* buffer = (char*) malloc(length);

char buf[1024];

memset(buffer, 0x00, sizeof(buffer));

fseek(fp, 0L, SEEK_SET);

while(fgets(buf, 1024, fp) != NULL)

strcat (buffer, buf);

fclose(fp);

return buffer;

}

void file_put_contents(char* filename, char* data) {

FILE* fp = fopen(filename, "w+");

if(!fp) {

printf("The file can not be opened.n");

exit(1);

}

fputs(data, fp);

fclose(fp);

}