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
    int8_t count = pos;
    uint8_t n = 0;
    while(count <(pos+len))
    {
        uint32_t t =(((val & (1<<n)) >> n)); 
        //printf("--%b\n",t);
        if(t)
        {
          reg |= (1<<count); 
        }
        else
        {
          reg &= ~(1<<count);
        }
    //    printf("%032b\n",reg);
        count++;
        n++;
    }
    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