1. Set or Clear a Specific Bit in a Register

#include <stdio.h>

int fun(int reg, int pos, int mode)
{
    

    if (mode == 1) {
        reg = reg | (1 << pos);      
    } else {
        reg = reg & ~(1 << pos);    
    }

    return reg;
}

int main() {
    int reg_val, bit_pos, mode;
    scanf("%d %d %d", &reg_val, &bit_pos, &mode);

    int output = fun(reg_val, bit_pos, mode);
    printf("%d", output);

    return 0;
}