In this tutorial you will learn about the C++ Program to Find the Frequency of Characters in a String and its application with practical example.
In this tutorial, we will create a c++ program to find frequency of occurrence of a character in a String using C++ programming language.
Prerequisites
Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:
- Operators.
- looping statements.
- Basic input/output.
- Basic c++ programming
- For Loop.
- String.
What Is frequency of occurrence of a character ?
frequency means to find and count given character present in the string.i.e total number of occurrence of a particular character in a string.
C++ Program to Find the Frequency of Characters in a String.
In this program we will we will find frequency of a given character. We would first declared and initialized the required variables. Next, user will be prompted to enter a string and a character to find the frequency of given character.
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#include <iostream> using namespace std; int main() { string strng; // declaring variables char ch; int i,count = 0; cout<<"enter any string "; cin>>strng; // getting a string from user. cout<<" enter character to find frequency"; cin>>ch; for ( i = 0; i < strng.size(); i++) { if (strng[i] == ch) // finding frequency of a given character. { count++; } } cout << "Number of frequency of " << ch << " = " << count; return 0; } |
Output
In the above program, we have first declared and initialized a set variables required in the program.
- strng = it will hold entered string.
- ch = it will hold a finding character.
- i= for iteration.
- count= count number of occurrence of a character.
And in the next statement user will be prompted to enter string and a character which will be assigned to variable ‘strng’ and in ‘ch’ respectively. Now we will loop through the size of a string using sizeof() function in each iteration we will compare string to given character to find the occurrence of a character and each matching condition we increase the counter value by one as shown in image.
This process will continues until the loop ends , and at last we will print the total number of occurrence of a given character in the string.This is the process of finding the frequency of occurrence of a character in a String.
