priyanshu070702 / facorial-sumation-calculator

facorial-sumation-calculator

#include

using namespace std;

int sum(int n){ if(n==0){ return 0; } else{ return sum(n-1)+n; } } int fac(int m){ if(m==0){ return 1; } else{ return fac(m-1)*m; } }

int main() { int choice,a,b; cout<<"choices are"<<endl; cout<<"press 1 for sum till a given number"<<endl; cout<<"press 2 for factorial of a number"<<endl; cout<<"for exit"<<endl; cout<<endl; do{ cout<<"enter thr choice"<<endl; cin>>choice;

switch(choice){
    case 1: cout<<"enter the number"<<endl;
    cin>>a;
    cout<<sum(a)<<endl;
    break;
    
    case 2: cout<<"enter the number"<<endl;
    cin>>b;
    cout<<fac(b)<<endl;
    break;
    
    default: cout<<"exited"<<endl;
}
}while(choice!=3);
return 0;

}