Question

Your program must define and call the following function that returns the number of times the input character appears in the input string. int CountCharacters(char userChar, string userString)

Answer 1

Answer:

The program to this question can be given as:

Program:

#include <iostream>  //header file

using namespace std;  //using name space.

int CountCharacters(char userChar,string userString) //define function.

{    

int count = 0;  //define variable

for (int i=0;i<userString.length();i++) //loop

if (userString[i]==userChar)  //if block

count++;  //increment the value.

return count;  //return value.

}

int main()  //main method.

{

   string userString= "Clanguage";  //define variable and assign value.

   char userChar = 'a';   //define variable and assign value.

   cout << CountCharacters(userChar,userString);  //calling function and print value.  

   return 0;  

}

Output:

2

Explanation:

• In the above C++ programming language program we define a function that is "CountCharacters". Inside function parameters, we pass two parameters that are "userChar and userString". The userChar is a char variable that holds single character value and userString is a string variable that holds a string value.
• In the function, we define an integer variable that is "count". This variable counts the match value and returns its value.
• To counts values, we define a loop in a loop we use if statement that counts the value that how many time it occurs in a string value and return its value.
• In the main method, we define these variables ("userChar and userString") and assign values that are "a and Clanguage " and call the function and print function return value.