Replace Bit Field in a 32-bit Register

Code

#include <stdio.h>
#include <stdint.h>

uint32_t replace_field(uint32_t reg, uint32_t val, uint8_t pos, uint8_t len) {
    // Your code here
    uint32_t mask =0;
    mask = ((1U<<len)-1)<<pos; //Generate the bit clear Mask
    reg &= ~(mask); //Clear the bits of the register which we want to replace
    mask = (val<<pos)&mask; //Generatae bit replace mask
    reg|=mask; //replace the bits
    return reg;
}

int main() {
    uint32_t reg, val;
    uint8_t pos, len;
    scanf("%u %u %hhu %hhu", &reg, &val, &pos, &len);
    printf("%u", replace_field(reg, val, pos, len));
    return 0;
}

Solving Approach