Question

I am new to c++ programming. I have read how parsing can be done in SO questions using vector(Int tokenizer).But I have tried the following for array. I am able to parse only one number from string. If input string is “11 22 33 etc”.

#include<iostream>
#include<iterator>
#include<vector>
#include<sstream>

using namespace std;

int main()
{

int i=0;
string s;
cout<<"enter the string of numbers \n";
cin>>s;
stringstream ss(s);
int j;
int a[10];
while(ss>>j)
{

    a[i]=j;
    i++;
}
for(int k=0;k<10;k++)
{
    cout<<"\t"<<a[k]<<endl;
}

}

If I give input as “11 22 33”

output

11
and some garbage values.

If i have initialized stringstream ss("11 22 33"); then its working fine. What am I doing wrong?

Answer 1

The problem is that:

cin>>s;

Reads one space separated word into s. So only 11 goes into s.

What you want is:

std::getline(std::cin, s);

Alternatively you can read numbers directly from std::cin

while(std::cin >> j) // Read a number from the standard input.