fread小函数

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(void)
{
    char buff[128];

    char *match;
    FILE* fd;
    int rdbyt;

    fd=fopen("F:/Downloads/test.txt","r");
    if(fd<0) {
        printf("open file error\n");
        return -1;
    }

    rdbyt = fread(buff,1,sizeof(buff),fd);
    fclose (fd);
    if(rdbyt<0) {
        printf("read error\n");
        return -1;
    }
    buff[rdbyt] = '\0';
    printf("%s\n",buff);

    match = strstr(buff,"dir=");
    if(match==0) printf("no match\n");
    else {
        sscanf(match,"dir=%s",buff);
    }
    printf("%s\n",buff);

    return 0;

}

运行结果：