利用strstr与atoi的结合实现一个C语言获取文件中数据的工具
源代码如下:
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
int get_buf_data(char *buf,char *data)
{
char *p1 =NULL,* p2=NULL;
int num =0;
p1 = buf;
p2 = strstr(p1,data);
if(p2 == NULL)
{
printf("%s no find %s --- %s\r\n",__FUNCTION__ ,buf,data);
return 0;
}
p1 = p2+strlen(data);
num = atoi(p1);
return num;
}
int main(void)
{
int fd = -1 ;
char buf[1024];
fd = open("build_mtk8127eng.sh",O_RDWR);
if(-1 == fd)
{
printf("open fair!\n");
return -1 ;
}
memset(buf,0,sizeof(buf));
read(fd,buf,1024);
close(fd);
int num = get_buf_data(buf,"student_num:");
printf("num:%d\n",num);
return 0 ;
} 对应的文件:
money_num:100
student_num:1000
work:12000