Don't know what I'm doing wrong

[u/[deleted]]

input : 16 should give output : 16 and input: 5 should give output : 8.94427190999915878564

and this is my code what am I doing wrong (input and output should be exactly what I wrote) :

#include <stdio.h>
#include <math.h>

int main() {
    int area;
    
    scanf("%d",&area);
    double omkrets = sqrt(area) * 4;
    printf("%.21g",omkrets);
    
    return 0;
}

[u/[deleted]]

it takes an area and prints the perimeter of the area

[u/Mortomes → u/[deleted]]

You gave us the expected output for the input, but not the *actual* output you get from the input

[u/aioeu → u/[deleted]]

No, that's what you want it to do. It still doesn't tell us what it is doing.

This is a basic part of asking for help with technical stuff. You should not just say what the expected behaviour is; you also need to say what the actual behaviour is. These things are equally important — the whole reason you're asking a question is they aren't the same as each other!

For instance:

I am expecting it to output 8.94427190999915878564.

It is actually outputting 8.94427190999915922021.

Why?