实例 - 二进制转换为八进制

include

include

int convertBinarytoOctal(long long binaryNumber);
int main()
{
long long binaryNumber;

printf("输入一个二进制数: ");
scanf("%lld", &binaryNumber);

printf("二进制数 %lld 转换为八进制为 %d", binaryNumber, convertBinarytoOctal(binaryNumber));

return 0;

}

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

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

i = 1;

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

return octalNumber;

}
输出结果为：

输入一个二进制数: 101001
二进制数 101001 转换为八进制为 51
实例 - 八进制转换为二进制

include

include

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 转二进制为 %lld", 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;

}