Question

Define a function that counts the number of lowercase and uppercase letters in an input C-String. DO NOT DEFINE TWO SEPARATE FUNCTIONS. (in C++)

Answer 1

#include<iostream>
#include<ctype.h>/* for functions isUpper(), isalpha()*/
using namespace std;

//function prototype
void countLowerAndUpperCase(char str[], int &countLower, int &countUpper);

int main()
{
   char str[100];//c-string
   cout << "Enter string: ";
   cin.getline(str, 100);
   int countLower = 0, countUpper = 0;
   //call the function
   countLowerAndUpperCase(str, countLower, countUpper);
   cout << "Number of lower case letters: " << countLower << "\nNumber of upper case letters: "
       << countUpper << endl;
   //to hold output screen
   system("pause");
   return 0;
}
/*
function definition--> count lower case and upper case

*/
void countLowerAndUpperCase(char str[], int &countLower, int &countUpper)
{
   /*loop until it found null character*/
   for (int i = 0; str[i] != '\0'; i++)
   {
       if (isalpha(str[i])) // if it is alphabet
       {
           if (isupper(str[i]))//check upper case
               countUpper++;
           else
               countLower++;
       }
   }
}

//output

//if you need any help regarding this solution ........ please leave a comment ....... thanks