下面这个小程序为什么总是在if(word= =8(or13))时出现问题
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <vector>

using namespace std;

int main()
{
    string filename, str;
    int word;
    vector<string> svec;
    cout << "输入文件名称" << endl;
    cin >> filename;

    ifstream infile(filename.c_str());
    if (!infile)  return -1;
    while (getline(infile, str))
    {
        svec.push_back(str);
    }
    infile.close();
    istringstream sstream;
    vector<string>::const_iterator ite = svec.begin();
    begin:
    while (ite != svec.end())
    {
        sstream.str(*ite);
        while (sstream >> word)
        {
            if (word = =12)
            {
             ++ite;
             cout << *ite << endl;
             sstream.clear();
             goto begin;
            }
         }
             sstream.clear();
             ++ite;
    }
    system("pause");
    return 0;
}