C++从文件中查找特定的字符串，并提取该字符串

#include<cstring>

#include<cstdio>

#include<iostream>

#include <atlstr.h>

using namespace std;
int main()
{
FILE *fp_statfile = fopen("123.txt", "a+");
CString filecontent("");
//文件内容读入内存
while (!feof(fp_statfile)) {
filecontent.AppendChar(getc(fp_statfile));
}
//查找X264的SSIM数值
//X264特征字符串
CString featurestr("MAC:");
//查找，返回字符串位置
int paraloc = filecontent.Find(featurestr);
CString parastr;
//找到了的话
if (paraloc != -1) {
for ( int i = 0; i < 10; i++)
{
//跳过特征字符串，提取5位
parastr = filecontent.Mid(paraloc + featurestr.GetLength(), 5);
printf("%s", parastr);
paraloc++;
}

}

fclose(fp_statfile);

}