строки в

#include <iostream>

using namespace std;

int main()
{   int mass=100;
    char a[mass];
    int b=0;
    cout << "vvedi stroky" << endl;
    cin.getline (a,mass);
    while (b<mass){
        if (a[b]>='a' && a[b]<='z') {
        a[b]=a[b]-32;
        }
        b++;
        }
        b=0;
        while (b<mass){
            cout << a[b];
            b++;
            if (a[b]==0){
                break;
            }
        }
}