C program to count occurrences of a character in a string

String Exercises

C Basics C Programming Tutorial Basic C Exercises Bitwise Operator Exercises Conditional Operator Exercises If else Exercises Switch case Exercises Loop Exercises Star Patterns Number Patterns Functions Exercises Array Exercises String Exercises Pointer Exercises File handling Exercises Data Structures

• C Programming Exercises
• Basic C programming exercises
• Bitwise operator exercises
• Conditional operator exercises
• If else exercises
• Switch case exercises
• Loop and iteration exercises
• Star patterns exercises
• Number pattern exercises
• Functions and recursion exercises
• Array and Matrix exercises
• String exercises
• Pointer exercises
• Files handling exercises

C program to count occurrences of a character in a string

Write a C program to count all occurrences of a character in a string using loop. How to find total occurrences of a given character in a string using for loop in C programming. Logic to count total occurrences of a character in a given string in C program.

Required knowledge

Basic C programming, C for loop, Array, functions, Strings

Logic to count occurrences of a character in given string

Below is the step by step descriptive logic to count occurrences of a character in given string.

1. Input a string from user, store it in some variable say str.
2. Input character to search occurrences, store it in some variable say toSearch.
3. Initialize count variable with 0 to store total occurrences of a character.
4. Run a loop from start till end of string str. The loop structure should look like while(str[i] != '\0').
5. Inside the loop if current character of str equal to toSearch, then increment the value of count by 1.

Program to count total occurrences of character in string

 
/**
 * C program to count all occurrences of a character in a given string
 */

#include <stdio.h>
#define MAX_SIZE 100 // Maximum string size

int main()
{
    char str[MAX_SIZE];
    char toSearch;
    int i, count;

    /* Input string and search character from user */
    printf("Enter any string: ");
    gets(str);
    printf("Enter any character to search: ");
    toSearch = getchar();

    count = 0;
    i=0;
    while(str[i] != '\0')
    {
        /*
         * If character is found in string then
         * increment count variable
         */
        if(str[i] == toSearch)
        {
            count++;
        }

        i++;
    }

    printf("Total occurrence of '%c' = %d", toSearch, count);

    return 0;
}

Output:

Enter any string: I love program coding
Enter any character to search: o
Total occurrence of 'o' = 3
Process returned 0 (0x0) execution time : 15.454 s

Follow @NEWSPAPERS_NEW

C Programming