2-4.cpp

完全正确的thinking in c++第二章习题答案

#include<string>
#include<iostream>
#include<fstream>
using namespace std;
int main()
{string word;
int sum=0;
string a;
ifstream in("2-4.cpp");
cout<<"please enter the a:"<<a;
cin>>a;
while(in>>word)
if(word==a)
sum=sum+1;
cout<<"sum="<<sum<<endl;
return 0;
}