When I enter two numbers the sum comes.. but when I input character as yes not y... Then it goes into an infinite loop... can anyone explain why? int a,b; char ch; do { cout<<"Enter two numbers: "; cin>>a>>b; cout<<"The sum is "<<a+b <<"\nDo you want to try again (y/n): "; cin>>ch; }while(ch=='Y'||ch=='y');

Answer 1

#include <iostream>
#include <stdio.h>//biblioteca para usar la funcion para limpiar el buffer

using namespace std;

int main() {
int a,b;
char ch;
do
{
fflush (stdin);
cout<<"Enter number 1: ";
cin>>a;
cout<<"enter number 2: ";
cin>>b;
fflush(stdin);//limpiando el buffer
cout<<"The sum is "<<a+b
<<"\nDo you want to try again (y/n): ";
cin>>ch;
}while(ch=='Y'||ch=='y');
return 0;
}

Answer 2

necesitas limpiar el buffer de entrada.... le hice unas cuantas modificaciones a tu codigo por comodidad.....saludos desde colombia