convert in octal

[shiwangi123456]

#include <math.h>
#include <stdio.h>
int convert(long long bin);
int main() {
long long bin;
printf("Enter a binary number: ");
scanf("%lld", &bin);
printf("%lld in binary = %d in octal", bin, convert(bin));
return 0;
}

int convert(long long bin) {
int oct = 0, dec = 0, i = 0;

// converting binary to decimal
while (bin != 0) {
    dec += (bin % 10) * pow(2, i);
    ++i;
    bin /= 10;
}
i = 1;

// converting to decimal to octal
while (dec != 0) {
    oct += (dec % 8) * i;
    dec /= 8;
    i *= 10;
}
return oct;

}