Set or Clear a Specific Bit in a Register

Code

#include <stdio.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    // Write your code here
    if (mode == 1){
        reg |= (1<<pos);

    }
    else{
        reg &= ~(1<<pos);
    }
    return reg;
}

int main() {
    unsigned char reg;
    int pos, mode;
    scanf("%hhu %d %d", &reg, &pos, &mode);
    printf("%d", modifyBit(reg, pos, mode));
    return 0;
}

Solving Approach

8 4 2 1
1 0 1 0 = 10

8 4 2 1
0 0 1 1 = 3

___________

shif 1
8 4 2 1
0 0 1 1 'is' 0110 = 6

0 1 1 0 = 6
_____________

8 4 2 1
1 0 1 0 = 10
0 1 1 0 = 6
__________
1 0 1 0 = 10

without shift 
8 4 2 1
1 0 1 0 = 10
0 0 1 1 = 3
_____________
1 0 1 1 = 11