Why is this program changing the value of variable B even if it is declared as static?

Question

/* Why is this program changing the value of variable B even if it is declared as static?*/

#include <stdio.h>
using namespace std;

void fn()
{
int a=10;
static int b=20;
printf("a=%d b=%d",++a,++b);
}
int main() {

fn();
fn();
return 0;
}

Answer 1

i think you are confusing static with a constant

Answer 2

Static => initialize only once.
constant​ => once declared, can't modify it's value
I think u looking for is constant​.

Answer 3

@Rajesh use the keyword const instead of static

Answer 4

Use const instead.

Answer 5

@Edward yes sir I am confused with static variable 😔

Answer 6

@Eranga thanks