코드 ¶

~cpp
#include <stdio.h>
#include <stdarg.h>
#include <math.h>

void PrintNumber(int leftGab, int number, double lowNumber)
{
	//// 음수처리 ////
	if (0 > number || 0 > lowNumber)
	{
		fputchar('-');
		number = abs(number);
		lowNumber = abs(lowNumber);
	}

	int numberSize = 0;
	for (int tempNumber = number; tempNumber > 0; ++numberSize)
		tempNumber /= 10;
	int powNumber = (int)pow((int)10, numberSize);
	
	//// 공백을 출력한다. ////
	for (register int i = 0; i < leftGab - numberSize; ++i)
		fputchar(' ');

	//// 정수부의 숫자를 출력한다. ////
	for (register int i = 0; i < numberSize; ++i)
	{
		fputchar((number % powNumber) / (powNumber / 10) + '0');
		powNumber /= 10;
	}

	//// 소수부의 숫자를 출력한다. ////
	if (0 != lowNumber)
	{
		fputchar('.');
		while(0 != lowNumber)
		{
			lowNumber *= 10;
			int printNumber = (int)lowNumber;
			fputchar(printNumber + '0');
			lowNumber -= printNumber;
		}
	}
}


void print(const char* outData, ...)
{
	va_list variables;
	va_start(variables, outData);
	for (register int readPoint = 0; 0 != outData[readPoint]; ++readPoint)
	{
		if ('%' == outData[readPoint])
		{
			++readPoint;
			//// 띄울 칸의 크기를 정합니다. ////
			int spaceSize = 0;
			for (; '0' <= outData[readPoint] && '9' >= outData[readPoint]; ++readPoint)
				spaceSize = spaceSize * 10 + (outData[readPoint] - '0');

			//// 인자에 맞게 출력을 합니다. ////
			if ('d' == outData[readPoint])
			{
				PrintNumber(spaceSize, va_arg(variables, int), 0);
			}
			else if ('f' == outData[readPoint])
			{
				double variableDouble = va_arg(variables, double);
				PrintNumber(spaceSize, (int)variableDouble / 1 , variableDouble - (int)variableDouble);
			}
			else if ('s' == outData[readPoint])
			{
				fputs(va_arg(variables, const char*), stdout); 
			}
		}
		else if ('@' == outData[readPoint])
		{
			++readPoint;
			fputchar('{');
			//// 인자에 맞게 출력을 합니다. ////
			if ('d' == outData[readPoint])
			{
				int* variableInts = va_arg(variables, int*);
				int variableSize = va_arg(variables, int);
				for (register int i = 0; i < variableSize; ++i)
				{
					if (0 != i)
						fputs(", ", stdout); 
					PrintNumber(0, variableInts[i], 0);
				}
			}
			else if ('f' == outData[readPoint])
			{
				double* variableDoubles = va_arg(variables, double*);
				int variableSize = va_arg(variables, int);
				for (register int i = 0; i < variableSize; ++i)
				{
					if (0 != i)
						fputs(", ", stdout); 
					PrintNumber(0, (int)variableDoubles[i] / 1 , variableDoubles[i] - (int)variableDoubles[i]);
				}
			}
			else if ('s' == outData[readPoint])
			{
				const char** variableStrings = va_arg(variables, const char**);
				int variableSize = va_arg(variables, int);
				for (register int i = 0; i < variableSize; ++i)
				{
					if (0 != i)
						fputs(", ", stdout); 
					fputs(variableStrings[i], stdout); 
				}
			}
			fputchar('}');
		}
		else
		{
			fputchar(outData[readPoint]);
		}
	}
	va_end(variables);
}

void main()
{
	int a = 10; 
	char *b = "example"; 
	double c = 10.5;
	print("number: %d, string: %s, real number: %f\n", a, b, c); 

	int aa[3] = { 1, 2, 3 }; 
	char *bb[2] = { "abc", "def" }; 
	print("array: @d\n", aa, 3); 
	print("array: @s\n", bb, 2); 

	int aaa = 123; 
	int bbb = 12345; 
	int ccc = 12345678; 
	print("number: %5d\n", aaa); 
	print("number: %5d\n", bbb); 
	print("number: %5d\n", ccc); 
}