【코딩】 C 언어로 진법변환 (10진법 → n진법)

C 언어로 진법변환 (10진법 → n진법)

 

추천글 : 【C 언어】 C 언어 목차

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#include <stdio.h>
#include <stdlib.h>
#define Converted_Number_Max_size 32
/* This source is for converting a decimal number in n-base system*/

int main(int argc, char *argv[]) {
	char data[36];
	data[0] = '0';
	data[1] = '1';
	data[2] = '2';
	data[3] = '3';
	data[4] = '4';
	data[5] = '5';
	data[6] = '6';
	data[7] = '7';
	data[8] = '8';
	data[9] = '9';
	data[10] = 'A';
	data[11] = 'B';
	data[12] = 'C';
	data[13] = 'D';
	data[14] = 'E';
	data[15] = 'F';
	data[16] = 'G';
	data[17] = 'H';
	data[18] = 'I';
	data[19] = 'J';
	data[20] = 'K';
	data[21] = 'L';
	data[22] = 'M';
	data[23] = 'N';
	data[24] = 'O';
	data[25] = 'P';
	data[26] = 'Q';
	data[27] = 'R';
	data[28] = 'S';
	data[29] = 'T';
	data[30] = 'U';
	data[31] = 'V';
	data[32] = 'W';
	data[33] = 'X';
	data[34] = 'Y';
	data[35] = 'Z';

	long long int Deci_Number;
	char Converted_Number_I[Converted_Number_Max_size]; // write a number backward
	char Converted_Number_II[Converted_Number_Max_size]; // write a number forward
	int i, j;
	int n;
	scanf("%lld %d", &Deci_Number, &n);

	for(i=0; ;i++){
		if(Deci_Number == 0) break; // n^i > Deci_Number(!=0) >= n^(i-1)
		Converted_Number_I[i] = data[Deci_Number % n];
		Deci_Number = Deci_Number / n; // quota (by n) would remain
	}
	for(j=0; j<i; j++){
		Converted_Number_II[j] = Converted_Number_I[i - 1 - j]; // reversing
	}
	for(j=0; j<i; j++) printf("%c", Converted_Number_II[j]);
	
    return 0;
}

 

입력: 2016.02.15 19:26