Fixed issue #149

1 files changed, 6 insertions, 92 deletions

diff --git a/tests/cpp/include/doubl2str.h b/tests/cpp/include/doubl2str.h
index 1a5e3fc..66f2b86 100644
--- a/tests/cpp/include/doubl2str.h
+++ b/tests/cpp/include/doubl2str.h
@@ -4,99 +4,13 @@
  *
  */
 
-
-
-char num2char(unsigned int num) 
+#include <sstream>
+#include <iomanip>
+std::string double2str(long double d)
 {
-	switch(num)
-	{
-	    case 0:
-	        return '0';
-	    case 1:
-	        return '1';
-	    case 2:
-	        return '2';
-	    case 3:
-	        return '3';
-	    case 4:
-	        return '4';
-	    case 5:
-	        return '5';
-	    case 6:
-	        return '6';
-	    case 7:
-	        return '7';
-	    case 8:
-	        return '8';
-	    case 9:
-	        return '9';
-	}
-
-	//return '\0';
-	return '-';
-}
-
-std::string double2str(long double D)
-{
-	int sign = (D > 0) ? 1 : (D*=-1.0, -1);
-	unsigned long long int Ceil = D;
-	
-	// if D is ceil
-	if(Ceil == D)
-	{
-		return std::to_string( (long long)(D*sign) );
-	}
-
-	// size of result buffer
-	const int bs = 32;
-	
-	// size of temporary buffer
-	const int pw = 16;
-	// Temporary buffer
-	char buf[pw];
-	// Result buffer
-	char rez[bs];
-
-	int i, size = 0;
-	// set sign
-	if(sign < 0) rez[size++] = '-';
-
-	// set ceil
-	std::string sceil = std::to_string(Ceil);
-	const char * bceil = sceil.c_str();
-	int sceillen = sceil.size();
-	for(i = 0; i < sceillen; i++)
-	{
-		rez[size++] = bceil[i];
-	}
-
-	// set point
-	rez[size++] = '.';
-	
-	unsigned long long int I =  D * 10000000000000000; // D * 10**pw
-	// .14159265359 -> 14159265359000000
-	I -= Ceil * 10000000000000000;
-
-	// Remove the tail of zeros
-	// 14159265359000000 -> 14159265359
-	while(0 == I % 10) I /= 10;
-
-	int ind = 0;
-	while(I > 0)
-	{
-		buf[ind++] = num2char(I%10);
-		I = (I - I%10) / 10;
-	}
-
-	// set fraction part
-	for(i = 0; i < ind; i++)
-	{
-		rez[size] = buf[ind-i-1];
-		size++;
-	}
-
-	return std::string(rez, size);
-	//rez[size] = '\0';
+	std::ostringstream strs;
+	strs << std::setprecision(16) << d;
+	return strs.str();
 }