十进制数转换成二进制、八进制、十六进制_数制的转换,编译将一个十进制整数转换为二进制数,八进制数,十六进制数

1、十进制转换成二进制

#include <stdio.h>
#include <stdlib.h>
 
#define MAXBITS 100
 
int main()
{
    int inputNumber;
 
    int re;
 
    int bits[MAXBITS];
 
    int j;
    int i = 0;
 
    printf("\t\tConverter decimal --> binary\n\n");
 
    //用户输入一个十进制数
    printf("\nenter a positive integer number: ");
    scanf("%d", &inputNumber);
 
    if (inputNumber < 0)
    {
        printf("only positive integers >= 0\n");
        return 1;
    }
 
    while (inputNumber > 0)
    {
        re = inputNumber % 2;
 
        inputNumber = inputNumber / 2;
 
        bits[i] = re;
        i++;
    }
 
    printf("\n the number in binary is: ");
 
    for (j = i - 1; j >= 0; j--)
    {
        printf("%d", bits[j]);
    }
 
    if (i == 0)
    {
        printf("0");
    }
 
    return 0;
}

测试结果：

Converter decimal --> binary
enter a positive integer number: 100

 the number in binary is: 1100100

2、十进制转换成十六进制

#include <stdio.h>
void decimal2Hexadecimal(long num);
 
int main()
{
    long decimalnum;
 
    printf("Enter decimal number: ");
    scanf("%ld", &decimalnum);
 
    decimal2Hexadecimal(decimalnum);
 
    return 0;
}
 
void decimal2Hexadecimal(long num)
{
    long decimalnum = num;
    long quotient, remainder;
    int i, j = 0;
    char hexadecimalnum[100];
 
    quotient = decimalnum;
 
    while (quotient != 0)
    {
        remainder = quotient % 16;
        if (remainder < 10)
            hexadecimalnum[j++] = 48 + remainder;
 
        else
            hexadecimalnum[j++] = 55 + remainder;
 
        quotient = quotient / 16;
    }
 
 
    for (i = j; i >= 0; i--)
    {
        printf("%c", hexadecimalnum[i]);
    }
 
    printf("\n");
}

 测试结果：

Enter decimal number: 100
64

3、十进制转换成八进制 

#include <stdio.h>
void decimal2Octal(long decimalnum);
 
int main()
{
    long decimalnum;
 
    printf("Enter the decimal number: ");
    scanf("%ld", &decimalnum);
 
    decimal2Octal(decimalnum);
 
    return 0;
}
 
void decimal2Octal(long decimalnum)
{
    long remainder, quotient;
 
    int octalNumber[100], i = 1, j;
    quotient = decimalnum;
 
    while (quotient != 0)
    {
        octalNumber[i++] = quotient % 8;
 
        quotient = quotient / 8;
    }
 
    for (j = i - 1; j > 0; j--) printf("%d", octalNumber[j]);
 
    printf("\n");
}

 测试结果：

Enter the decimal number: 100
144
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