숫자 자리수별 심볼 표시하기 K, M, G, T, P

게임내에 숫자를 약식 표현하기위해 단위 자리수 마다 단위 알파벳을 붙인다.

규칙1. 단위별 알파벳 표현.

규칙2. 기호가 바뀌는 단위와 일치할 시 소수점 첫째자리까지 표현.

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 std::string numberSymbol(int64_t num)
 {
	 // int64_t 자리수 21자리
	 //-9,223,372,036,854,775,808 ~ 9,223,372,036,854,775,807 
	 char temp[64] = { 0, };
	 sprintf(temp, "%lld", num);
	 std::string strNum = temp;
	 int strLength = strNum.length();
	 if (strLength < 4)
	 {
		 return strNum;
	 } 
	 int unit = 7;
	 std::string symbol[] = { "K", "M", "G", "T", "P", "E", "Z"};
	 for (int n_i = 0; n_i < symbol->size(); n_i++)
	 {
		 int b;
		 unit += n_i * 3;
		 if (n_i == 0)
		 {
			 if (strLength < unit)
			 {
				 if (strLength == unit - (unit - 4))
				 {
					 b = 2;
					 strNum = strNum.substr(0, b);
					 strNum = strNum.substr(0, strNum.length() - 1) + "." + strNum.substr(strNum.length() - 1, strNum.length());
				 }
				 else
				 {
					 b = (n_i + 1) * 3;
					 strNum = strNum.substr(0, strNum.length() - b);
				 }
				 strNum += symbol[n_i];
				 break;
			 } 
		 } 
		 else
		 {
			 if (strLength < unit)
			 {
				 if (strLength == unit - 3)
				 {
					 b = 2;
					 strNum = strNum.substr(0, b);
					 strNum = strNum.substr(0, strNum.length() - 1) + "." + strNum.substr(strNum.length() - 1, strNum.length());
				 }
				 else
				 {
					 b = (n_i + 1) * 3;
					 strNum = strNum.substr(0, strNum.length() - b);
				 }
				 strNum += symbol[n_i];
				 break;
			 }			 
		 } 
	 }
	 return strNum;
 }

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호출

std::string a = numberSymbol(1);

NLOG("a : %s", a.c_str());

a = numberSymbol(12);

NLOG("a : %s", a.c_str());

a = numberSymbol(123);

NLOG("a : %s", a.c_str());

a = numberSymbol(1234);

NLOG("a : %s", a.c_str());

a = numberSymbol(12345);

NLOG("a : %s", a.c_str());

a = numberSymbol(123456);

NLOG("a : %s", a.c_str());

a = numberSymbol(1234567);

NLOG("a : %s", a.c_str());

a = numberSymbol(12345678);

NLOG("a : %s", a.c_str());

a = numberSymbol(123456789);

NLOG("a : %s", a.c_str());

a = numberSymbol(1234567890);

NLOG("a : %s", a.c_str());

a = numberSymbol(12345678901);

NLOG("a : %s", a.c_str());

a = numberSymbol(123456789012);

NLOG("a : %s", a.c_str());

a = numberSymbol(123456789012);

NLOG("a : %s", a.c_str());

로그 :

result : 1

result : 12

result : 123

result : 1.2K

result : 12K

result : 123K

result : 1.2M

result : 12M

result : 123M

result : 1.2G

result : 12G

result : 123G