I have organized the contents. (namespace, code)

Author: j2doll

excelColumnNumber/excelColumnNumber.cpp

@@ -0,0 +1,88 @@
+// excelColumnNumber.cpp
+
+#include "excelColumnNumber.h"
+
+namespace excelColumnNumber { // {{ begin of namespace
+
+std::string convertFromNumberToExcelColumn(unsigned int n)
+{
+    if (0 == n)
+    {
+        return std::string();
+    }
+
+    // main code from https://www.geeksforgeeks.org/find-excel-column-name-given-number/
+    // Function to print Excel column name for a given column number
+
+    std::string stdString;
+
+    char str[1000]; // To store result (Excel column name)
+    memset( str, '\0', sizeof(str) );
+    unsigned int i = 0; // To store current index in str which is result
+
+    while ( n > 0 )
+    {
+        // Find remainder
+        int rem = n % 26;
+
+        // If remainder is 0, then a 'Z' must be there in output
+        if ( rem == 0 )
+        {
+            str[i++] = 'Z';
+            n = (n/26) - 1;
+        }
+        else // If remainder is non-zero
+        {
+            str[i++] = (rem-1) + 'A';
+            n = n / 26;
+        }
+    }
+    str[i] = '\0';
+
+    // Reverse the string and print result
+    std::reverse( str, str + strlen(str) );
+
+    stdString = str;
+    return stdString;
+}
+
+unsigned int alphabetToNumber(char alphabet)
+{
+	unsigned int ret = 0;
+	
+	// a .. z : 97 ... 122	
+	// A .. Z : 65 ...  90
+	
+	unsigned int castAlphabet = (unsigned int) alphabet;
+	
+	if ( castAlphabet >= 97 && castAlphabet <= 122 ) 
+	{
+		ret = castAlphabet - 97 + 1; 
+	}
+	
+	if ( castAlphabet >= 65 && castAlphabet <= 90 ) 
+	{
+		ret = castAlphabet - 65 + 1; 
+	}	
+		
+	return ret; 
+}
+
+unsigned int excelColumnStingToNumber(std::string col)
+{
+    unsigned int ret = 0;
+    unsigned int colSize = col.size();
+
+    for (int colIt = 0 ; colIt < colSize ; colIt++)
+    {
+        char chCol = col.at( colSize - (colIt + 1) );
+        unsigned int numCol = alphabetToNumber( chCol );
+
+        unsigned int calc = pow( 26, colIt ) * numCol;
+        ret = ret + calc;
+    }
+	
+	return ret; 
+}
+
+} // }} end of namespace

excelColumnNumber/excelColumnNumber.h

@@ -0,0 +1,21 @@
+// excelColumnNumber.h 
+
+#include <iostream>
+#include <string>
+#include <limits>
+#include <iterator>
+#include <algorithm>
+
+#include <cstdio>
+#include <cstring>
+#include <cmath>
+#include <cassert>
+
+namespace excelColumnNumber
+{
+    std::string convertFromNumberToExcelColumn(unsigned int n);
+    unsigned int excelColumnStingToNumber(std::string col);
+
+    unsigned int alphabetToNumber(char alphabet);
+}
+

excelColumnNumber/main.cpp

@@ -11,122 +11,29 @@
 #include <cmath>
 #include <cassert>
 
-namespace excelNumber
-{
-    std::string convertFromNumberToExcelColumn(unsigned int n);
-    unsigned int excelColumnStingToNumber(std::string col);
-
-    unsigned int alphabetToNumber(char alphabet);
-}
+#include "excelColumnNumber.h"
 
 int main(int argc, char *argv[])
 {
-    std::cout << excelNumber::convertFromNumberToExcelColumn( 0 ) << std::endl ;
-    std::cout << excelNumber::convertFromNumberToExcelColumn( 1 ) << std::endl ;
-    std::cout << excelNumber::convertFromNumberToExcelColumn( 100 ) << std::endl ;
-    std::cout << excelNumber::convertFromNumberToExcelColumn( UINT_MAX ) << std::endl ;
+    std::cout << excelColumnNumber::convertFromNumberToExcelColumn( 0 ) << std::endl ;
+    std::cout << excelColumnNumber::convertFromNumberToExcelColumn( 1 ) << std::endl ;
+    std::cout << excelColumnNumber::convertFromNumberToExcelColumn( 100 ) << std::endl ;
+    std::cout << excelColumnNumber::convertFromNumberToExcelColumn( UINT_MAX ) << std::endl ;
 
 	std::cout << " ------------ " << std::endl ; 
 
-    std::cout << excelNumber::alphabetToNumber('a') << std::endl ;
-    std::cout << excelNumber::alphabetToNumber('z') << std::endl ;
-    std::cout << excelNumber::alphabetToNumber('A') << std::endl ;
-    std::cout << excelNumber::alphabetToNumber('Z') << std::endl ;
-    std::cout << excelNumber::alphabetToNumber('5') << std::endl ;
+    std::cout << excelColumnNumber::alphabetToNumber('a') << std::endl ;
+    std::cout << excelColumnNumber::alphabetToNumber('z') << std::endl ;
+    std::cout << excelColumnNumber::alphabetToNumber('A') << std::endl ;
+    std::cout << excelColumnNumber::alphabetToNumber('Z') << std::endl ;
+    std::cout << excelColumnNumber::alphabetToNumber('5') << std::endl ;
 
     std::cout << " ------------ " << std::endl ;
 
-    unsigned int debug1 = excelNumber::excelColumnStingToNumber("AB");
-    std::string debug2 = excelNumber::convertFromNumberToExcelColumn( debug1 );
+    unsigned int debug1 = excelColumnNumber::excelColumnStingToNumber("AB");
+    std::string debug2 = excelColumnNumber::convertFromNumberToExcelColumn( debug1 );
     std::cout << debug1 << "   " << debug2 << std::endl;
     assert( debug2 == "AB" );
 
     return 0;
-}
-
-
-namespace excelNumber
-{
-
-std::string convertFromNumberToExcelColumn(unsigned int n)
-{
-    if (0 == n)
-    {
-        return std::string();
-    }
-
-    // main code from https://www.geeksforgeeks.org/find-excel-column-name-given-number/
-    // Function to print Excel column name for a given column number
-
-    std::string stdString;
-
-    char str[1000]; // To store result (Excel column name)
-    memset( str, '\0', sizeof(str) );
-    unsigned int i = 0; // To store current index in str which is result
-
-    while ( n > 0 )
-    {
-        // Find remainder
-        int rem = n % 26;
-
-        // If remainder is 0, then a 'Z' must be there in output
-        if ( rem == 0 )
-        {
-            str[i++] = 'Z';
-            n = (n/26) - 1;
-        }
-        else // If remainder is non-zero
-        {
-            str[i++] = (rem-1) + 'A';
-            n = n / 26;
-        }
-    }
-    str[i] = '\0';
-
-    // Reverse the string and print result
-    std::reverse( str, str + strlen(str) );
-
-    stdString = str;
-    return stdString;
-}
-
-unsigned int alphabetToNumber(char alphabet)
-{
-	unsigned int ret = 0;
-	
-	// a .. z : 97 ... 122	
-	// A .. Z : 65 ...  90
-	
-	unsigned int castAlphabet = (unsigned int) alphabet;
-	
-	if ( castAlphabet >= 97 && castAlphabet <= 122 ) 
-	{
-		ret = castAlphabet - 97 + 1; 
-	}
-	
-	if ( castAlphabet >= 65 && castAlphabet <= 90 ) 
-	{
-		ret = castAlphabet - 65 + 1; 
-	}	
-		
-	return ret; 
-}
-
-unsigned int excelColumnStingToNumber(std::string col)
-{
-    unsigned int ret = 0;
-    unsigned int colSize = col.size();
-
-    for (int colIt = 0 ; colIt < colSize ; colIt++)
-    {
-        char chCol = col.at( colSize - (colIt + 1) );
-        unsigned int numCol = alphabetToNumber( chCol );
-
-        unsigned int calc = pow( 26, colIt ) * numCol;
-        ret = ret + calc;
-    }
-	
-	return ret; 
-}
-
-} // end of namespace
+}