八进制转换为二进制

八进制转换为二进制

#include <stdio.h>
#include <math.h>
long long convertOctalToBinary(int octalNumber);
int main()
{
    int octalNumber;
    printf("输入一个八进制数: ");
    scanf("%d", &octalNumber);
    printf("八进制数 %d 转换为二进制位 %lld",octalNumber,convertOctalToBinary(octalNumber));
    return 0;
}
long long convertOctalToBinary(int octalNumber)
{
    int decimalNumber=0;
    int  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;
}