8진수 2진수 변환

#include <stdio.h>
#include <math.h>

long long convertOctalToBinary(int octalNumber);
int main(void){
int octalNumber;

printf("Enter an octal number: ");
scanf("%d", &octalNumber);

printf("%d in octal = %lld in binayr", octalNumber, convertOctalToBinary(octalNumber));

return 0;
}

long long convertOctalToBinary(int octalNumber){
int decimalNumber = 0, i = 0;
long long binaryNumber = 0;

while(octalNumber != 0){
decimalNumber += (octalNumber%10) * pow(8, i);
++i;
octalNumber /= 10;
}

i = 1;

while(decimalNumber != 0){
binaryNumber += (decimalNumber % 2) * i;
decimalNumber /= 2;
i *= 10;
}

return binaryNumber;
}

8 진수 입력: 67

2 진수 110111