Set or Clear a Specific Bit in a Register

#include <stdio.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    // Write your code here
    return 0;
}

int main() {
    int reg;
    int pos, mode;
    scanf("%hhu %d %d", &reg, &pos, &mode);
    
    reg=reg|(1<<(pos));
    if(mode==0){
        reg=reg^(1<<(pos));  
    }
    printf("%hhu",reg);
    return 0;
}