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C++ Programming Code Examples

C++ > Strings Code Examples

program to count spaces in a string

program to count spaces in a string

Write a program which calculate number of spaces in a string using pointer. Make a separate function which takes a pointer and using for loop it calculates all spaces.
This example covers the concept of 

    pointers in c++
    functions
    loop

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;
}

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