- C Programming Examples
- C Programming Examples
- C Print Hello World
- C Get Input from User
- C Print Integer
- C Add Two Numbers
- C Add Subtract Multiply Divide
- C Add n Numbers
- C Area Perimeter of Square
- C Area Perimeter of Rectangle
- C Area Circum of Circle
- C Fahrenheit to Celsius
- C Celsius to Fahrenheit
- C Inches to Centimeters
- C Kilogram to Gram
- C Reverse a Number
- C Swap Two Numbers
- C Interchange Numbers
- C Print ASCII Value
- C Print Fibonacci Series
- C Check Palindrome or Not
- C Check Armstrong or Not
- C Find Armstrong Numbers
- C Find nCr and nPr
- C Find Profit Loss
- C Sum of their Square
- C First & Last Digit Sum
- C Sum of All Digit
- C Product of All Digit
- C Print Total Digit in Number
- C Check Perfect Number
- C Find Basic Gross Salary
- C Round Number to Integer
- C Print Series upto n Term
- C Find Factors of Number
- C if-else & Loop Programs
- C Check Even or Odd
- C Check Prime or Not
- C Check Alphabet or Not
- C Check Vowel or Not
- C Check Leap Year or Not
- C Is Reverse Equal Original
- C Make Calculator
- C Add Digits of Number
- Count Positive Negative Zero
- C Largest of Two Numbers
- C Largest of Three Numbers
- C Smallest of Two Numbers
- C Smallest of Three Numbers
- C Find Factorial of Number
- C Find LCM & HCF
- C Find LCM of n Numbers
- C Find HCF of n Numbers
- C Find Arithmetic Mean
- C Find Average, Percentage
- C Find Student Grade
- C Print Table of Number
- C Print Prime Numbers
- C Find Discount Purchase
- C Calculate Parcel Charge
- C Calculate Wage of Labor
- C Print Phone Bill
- C Conversion programs
- C Decimal to Binary
- C Decimal to Octal
- C Decimal to Hexadecimal
- C Binary to Decimal
- C Binary to Octal
- C Binary to Hexadecimal
- C Octal to Decimal
- C Octal to Binary
- C Octal to Hexadecimal
- C Hexadecimal to Decimal
- C Hexadecimal to Binary
- C Hexadecimal to Octal
- C Pattern Programs
- C Pattern Printing Programs
- C Print Diamond Pattern
- C Print Floyd's Triangle
- C Print Pascal's Triangle
- C Array Programs
- C 1D Array Programs
- C Linear Search
- C Binary Search
- C Largest Element in Array
- C Smallest Element in Array
- C Second Largest/Smallest
- C Count Even Odd
- C Array Element at Even
- C Array Element at Odd
- C Print Even Array Elements
- C Print Odd Array Elements
- C Sum/Product of Even/Odd
- C Reverse an Array
- C Insert Element in Array
- C Delete Element from Array
- C Merge Two Arrays
- C Bubble Sort
- C Selection Sort
- C Insertion Sort
- C Print Common Elements
- C 2D Array Programs
- C Add Two Matrices
- C Subtract Two Matrices
- C Transpose a Matrix
- C Multiply Two Matrices
- C Sum All Matrix Elements
- C Largest Element in Matrix
- C Print Row Column Total
- C 3D Array Programs
- C String Programs
- C Print String
- C Find Length of String
- C Compare Two String
- C Copy a String
- C Concatenate String
- C Reverse a String
- C Count Vowels Consonants
- C Replace Vowel in String
- C Delete Vowels from String
- C Delete Word from String
- C Frequency of Character
- C Count Word in String
- C Remove Spaces from String
- C Sort a String
- C Sort String in Alphabetical
- C Sort Words in Ascending
- C Sort Words in Descending
- C Uppercase to Lowercase
- C Lowercase to Uppercase
- C Swap Two Strings
- C Check Anagram or Not
- C Check Palindrome String
- C Print Number in Words
- C Print Successive Character
- C Character without Space
- C File Programs
- C Read a File
- C Write Content to File
- C Read & Display File
- C Copy a File
- C Merge Two Files
- C Reverse File
- C Count All Character in File
- C List Files in Directory
- C Encrypt & Decrypt a File
- C Delete a File
- C Misc Programs
- Generate Random Numbers
- C Print Date Time
- C Print Message with Time
- C Get IP Address
- C Print Smiling face
- C Pass Array to Function
- Add Two Numbers using Pointer
- C Address of Variable
- C Shutdown Computer
- C Programming Tutorial
- C Tutorial
C Program to Count the Occurrences of a Word in a String
This article will teach you and provide you with code to count the occurrences of a word in a string using the C programming language. The user must enter the word and string here (at run-time). For example, if the given string is:
It was codescracker. It is codescracker. It will be codescracker
then the occurrence of the word
- codescracker is 3
- It is 3
- was is 1
- is is 1
- will is 1
- be is 1
Now let's move on and implement it in a C program.
Counting Words in a String
To count the occurrence of a word in a string or sentence in C programming, you have to ask the user to enter the string and a word, and then count how many times the given word is available in the given string, as shown in the program given below:
#include<stdio.h> #include<conio.h> #include<string.h> int main() { char str[100], word[20]; int i, j, ls, lw, temp, countW=0, chk; printf("Enter the String: "); gets(str); printf("Enter a Word: "); gets(word); ls = strlen(str); lw = strlen(word); for(i=0; i<ls; i++) { temp = i; for(j=0; j<lw; j++) { if(str[i]==word[j]) i++; } chk = i-temp; if(chk==lw) countW++; i = temp; } printf("\nOccurrence = %d", countW); getch(); return 0; }
The program was written in the Code::Blocks IDE. Here is its sample run after a successful build and run:
Now supply any string, say
It was codescracker. It is codescracker. It will be codescracker
And then enter a word, say "codescracker," to count how many times this word occurred in the given string:
Program Explained
- The two variables, ls and lw, are used to hold the length of string and word, respectively.
- The first for loop runs from the first character to the last character of the string.
- And the second for loop runs from the first character to the last character of the given word.
- In the second for loop, we have checked whether the given word is present inside the string or not, using character-by-character matching.
- That is, if the first character of a word gets found in the string at any index, then it checks for a second match. That is, match the second character of a word with the character just after the previous index, and so on.
- For example, let's suppose the given word is "codescracker." So its length is 12. Therefore, if all characters continuously get matched in the given string, then the value of i will be (its previous value + 12).
- And after exiting the second for loop, using i-temp or (i's previous value + 12)-temp gets initialized to chk.
- If the previous value of i was 7, the value of i will be 7 + 12 or 19.
- And 19-temp or 19-7 equals 12. As a result, 12 is set up to chk.
- Now check whether the value of chk is equal to the length of the word or not.
- If it is equal, then the word gets found, so we have to increment the value of the countW variable, which holds the occurrence of the word.
- Finally, initialize the value of temp (the value of the previous i before the second for the loop).
- And so on until you reach the last character of the string.
This program has a limitation: if you enter a string, such as "this is codescracker," and a word, such as "is," the occurrence will be displayed as 2. Because "is" from "this" will be counted as well. To overcome this problem, let me create another program for you.
Complete Version of the Counting a Word in a String Program
Here is the complete version of the previous program:
#include<stdio.h> #include<conio.h> #include<string.h> int main() { char str[100], word[20]; int i, j, ls, lw, temp, countW=0, chk, doIncrement; printf("Enter the String: "); gets(str); printf("Enter a Word: "); gets(word); ls = strlen(str); lw = strlen(word); for(i=0; i<ls; i++) { temp = i; doIncrement = 0; for(j=0; j<lw; j++) { if(str[i]==word[j]) { if(temp>0 && (temp+lw)<ls) { if(str[temp-1]== ' ' && str[temp+lw]==' ') doIncrement=1; } else if(temp==0 && (temp+lw)<ls) { if(str[temp+lw]==' ') doIncrement=1; } else if(temp>0 && (temp+lw)==ls) { if(str[temp-1]== ' ') doIncrement=1; } if(doIncrement==1) i++; else break; } } chk = i-temp; if(chk==lw) countW++; i = temp; } printf("\nOccurrence = %d", countW); getch(); return 0; }
Now let's check it out with string input as "this is is is isth codescracker," and word input as "is."
The same program in different languages
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