cin.clear() question: Not able to clear the status of cin stream

[ertss]

Hi all,
I have a small piece of code that I want to do a series of function of while(cin>>temp) kind of operation.
But if i input 8 and 9 then enter an non-integer number, the program run past the next function of while(cin>>temp).

In the console it's something like this:
For the 0th element:
8
9
g
For the 1th element:
For the 2th element:
For the 3th element:
For the 4th element:
17 0 0 0 0

I used cin.clear() but it still doesn't work. Could someone help me on that? Thanks a lot.

#include <iostream>
#include <vector>

using namespace std;

void c_plus_plus(vector<int> &ivec, int n){
  int temp;
  cout<<"For the "<<n<<"th element:"<<endl;
  while(cin>>temp)
    ivec[n]=ivec[n]+temp;
}

int main(){
  
  vector<int> ivec(5);

  for(int i=0;i<5;i++){
    c_plus_plus(ivec, i);
    cin.clear(iostream::failbit);
  }

  for(int i=0;i<5;i++)
    cout<<ivec[i]<<" ";


  return 0;
}

[Philip Nicoletti]

It is not enough to clear the streams internal flags, you need to remove
the offending characters from the stream's buffer. This is usually done
using the ignore() member function:

  for(int i=0;i<5;i++)
  {
    c_plus_plus(ivec, i);
    cin.clear();
    cin.ignore(1000,'\n');
  }

[ertss]

Thanks a lot Philip!
u r the best.