C 语言实例 – 二进制与十进制相互转换

#include <stdio.h>
#include <math.h>
 
int convertBinaryToDecimal(long long n);
 
int main()
{
    long long n;
    printf("输入一个二进制数: ");
    scanf("%lld", &n);
    printf("二进制数 %lld 转换为十进制为 %d", n, convertBinaryToDecimal(n));
    return 0;
}
 
int convertBinaryToDecimal(long long n)
{
    int decimalNumber = 0, i = 0, remainder;
    while (n!=0)
    {
        remainder = n%10;
        n /= 10;
        decimalNumber += remainder*pow(2,i);
        ++i;
    }
    return decimalNumber;
}

#include <stdio.h>
#include <math.h>
 
long long convertDecimalToBinary(int n);
 
int main()
{
    int n;
    printf("输入一个十进制数: ");
    scanf("%d", &n);
    printf("十进制数 %d 转换为二进制位 %lld", n, convertDecimalToBinary(n));
    return 0;
}
 
long long convertDecimalToBinary(int n)
{
    long long binaryNumber = 0;
    int remainder, i = 1, step = 1;
 
    while (n!=0)
    {
        remainder = n%2;
        printf("Step %d: %d/2, 余数 = %d, 商 = %d\n", step++, n, remainder, n/2);
        n /= 2;
        binaryNumber += remainder*i;
        i *= 10;
    }
    return binaryNumber;
}