Thursday, 7 June 2012

C++ Program to insert comma at appropriate position in an entered (max-15) digit number as per the mathematical theory

C++ Program to insert comma at appropriate position in an entered (max-15) digit number as per the mathematical theory


#include <iostream.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <conio.h>
void AddCommas( char * In, char * Out );
int main()


    {
    clrscr();
    char Input[17];
        char Output[21];
        printf("Please enter a number (max 15 char) ");
        cin.get(Input,16);
    AddCommas(Input, Output);
    cout<<Output<<endl;
    system("pause");
    getch();
        return 0;
}
void AddCommas( char * In, char * Out )


    {
    int nLength = strlen(In);
    int incr;
    int nCount;
    int nPosition = 0;
    if( (nLength % 3) == 0 )
        nCount = 0;
    else


        {
            if( ((nLength % 3) == 1) && (In[0] == '-') )
                nCount = -1;
            else
                nCount = 3 - (nLength % 3);
        }
    for ( incr = 0; incr < nLength; incr++)


        {
            if( nCount == 3 )


                {
                    Out[nPosition] = ',';
                    nPosition++;
                    nCount = 0;
                }
                Out[nPosition] = In[incr];
                nPosition++;
                nCount++;
            }
            Out[nPosition] = 0; //terminating zero
        }

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