CODEWITHSUNDEEP
c++
DJKristy
DJKristy

Reputation: 27

giving char value as array index gives wrong output

I gave a char c, value (c='1') as array index to print and it gave me a wrong output

#include<iostream>
using namespace std;
int main()
{
    int a[5];
    cin>>a[1]; //5
    char c ='1';
    cout<<c<<" "<<a[c];

}

I expect the output of 5, but the actual output is some random number

Upvotes: 0

Views: 45

Answers (1)

Dmitry Kuzminov
Dmitry Kuzminov

Reputation: 6600

Your output code is equivalent to:

cout << c << " " << a[int(c)];

In other words:

cout << '1' << " " << a[49];

That is just an undefined behavior. Enjoy the nasal demons.

Upvotes: 2

Related Questions