打开文件

#include <stdio.h>
#include <iostream>
#include <string.h>
using namespace std;

int main()
{
    FILE* fp = fopen("a.txt","r");
    if(fp==NULL)
    {
        cout << "打开文件失败" << endl;
        return -1;
    }
    int startPos = 3;
    fseek(fp,startPos,SEEK_SET);
    char buf[512];
    bzero(buf,sizeof(buf));
    while(fgets(buf,sizeof(buf),fp)){
        cout << buf;
    }
    fclose(fp);
}

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