Thread: recursion

Code:

int powers(int x; unsigned int y) {
    if(y==0) {
        cout<<"1";//any base to the power of 0 is 1
        return 1; }
    else {
    powers(x*x(y-1)); }

}

Your old version was only putting cout<<"1"; in the if statement and calling return 1; no matter what. Also, this is more personal, but not putting brackets around code in if statements is ugly and evil. *Shudder*

Edit: Both Sean and Thantos beat me. D'oh!

Code:

int main()
{
    char op='c';
    int x,y;
    while (op!='e')
    {
    cout<<"What operation would you like to perform add(+), subtract(-),divide(/),multiply(*), Powers(^) (e)exit?";
    cin>> op;
    switch(op)
    {
    case '^':
    cout<<"Enter the the base then power"<<endl;
    cin>>x;
    cin>>y;
    cout<<powers(x,y)
    break;

in function 'int main()'
syntax error before 'break'

Could you please tell me how to fix these problems?

Semicolon after the call to powers().

Edit: Ha! I beat Sean this time

Yay it works!
This is all of my code if you care.

Code:

#include <iostream>

    int multiply(int x,int y)
    {
    return x*y;
    }
    
    int powers(int x, unsigned y)
    {
    if(y==0)
    return 1;
    else
    return(x*powers(x, y-1));
    }
    
    int divide(int x, int y)
    {
    return x/y;
    }
    
    int add(int x, int y)
    {
    return x+y;
    }
    
    int subtract(int x, int y)
    {
    return x-y;
    }

using namespace std;

int main()
{
    char op='c';
    int x,y;
    while (op!='e')
    {
    cout<<"What operation would you like to perform add(+), subtract(-),divide(/),multiply(*), Powers(^) (e)exit?";
    cin>> op;
    switch(op)
    {
    case '^':
    cout<<"Enter the the base then power"<<endl;
    cin>>x;
    cin>>y;
    cout<<powers(x,y)<<endl;
    break;

    case '+':
    cout<<"Enter the numbers you would like to add."<<endl;
    cin>>x;
    cin>>y;
    cout<<x<<"+"<<y<<"="<<add(x,y)<<endl;
    break;
    
    case'-':
    cout<<"Enter the numbers you would like to subtract."<<endl;
    cin>>x;
    cin>>y;
    cout<<x<<"-"<<y<<"="<<subtract(x,y)<<endl;
    break;
    
    case'/':
    cout<<"Enter the numbers you would like to divide."<<endl;
    cin>>x;
    cin>>y;
    cout<<x<<"/"<<y<<divide(x,y)<<endl;
    break;
    
    case'*':
    cout<<"Enter the numbers you would like to multiply."<<endl;
    cin>>x;
    cin>>y;
    cout<<x<<"*"<<y<<multiply(x,y)<<endl;
    break;
    case'e':
    return 0;
    default:
    cout<<"sorry, try again."<<endl;
    }
    }
    
    return 0;
}

Thanks for the help.