c++ program to count spaces in a string using pointers

Write a c++ program that calculates a number of spaces in a string using pointers. 

Make a separate function that takes a pointer then using for loop it calculates all spaces.

This example covers the concept of 

• pointers in c++
• functions
• loops in c++

C++ source code

#include <iostream>
using namespace std;
void Calculate_Spaces_alpha(char *);
int main()
{
 char string [] = "This string contains four spaces";
 cout <<"String is "<<"\n%----------------------%\n" << string << endl;
 char *str = string;
 Calculate_Spaces_alpha(str);
 return 0;
}

void Calculate_Spaces_alpha(char *ptr)
{
 int spaces = 0;
 int characters = 0;
 for ( ; ; ptr++)
 {
  if (*ptr == ' ')
   spaces++;

  if (*ptr != '\0')
   characters++;
  else
   break;
 }
 cout << "\nIn the String: "<< endl << "Characters:  "<< characters << endl <<"Spaces:  " << spaces << endl;
}

This code has been tested on the c++ Code blocks compiler

code view

also check more examples here: C++ Example Source Codes