problem with isdigit function and while loops in c++

Asked Jan 05 '21 at 20:40

Active Jan 05 '21 at 20:40

Viewed 34 times

I'm new to c++ and trying to code a v simple program where it uses a while loop for user to input numbers where it adds those numbers together but as soon as a word or letter is input it breaks and outputs the sum of, excluding any alphabetical input. Here's the code:

#include <iostream>
using namespace std;

int main() {
    char ans;
    int ans1 = 0;
    cout << "Enter numbers to be added" << endl;
    cin >> ans;
    while (isdigit(ans)) {
        cin >> ans;
        ans1 = ans1 + ans;
    }
    
    cout << ans1 << endl;

    return 0;
}

It's probably something that's been staring me right in the face, but I'd appreciate any help. Thank you

asked Jan 05 '21 at 20:40

gratefulgremlin

3

You haven't told us what the problem is. – JarMan Jan 05 '21 at 20:42
You read characters, but then add them as integer values. Keep in mind that ASCII `'0' == 48`. – dxiv Jan 05 '21 at 20:48
The problem is that it adds the ASCII value of the letters to the result as well. – gratefulgremlin Jan 05 '21 at 20:50
*The problem is that it adds the ASCII value of the letters to the result as well* --Isn't that what you wrote? `ans1 = ans1 + ans;`? – PaulMcKenzie Jan 05 '21 at 20:54
Provide some sample input, what you expect from it, and what you actually get. – Retired Ninja Jan 05 '21 at 20:54

problem with isdigit function and while loops in c++

0 Answers0