C Program to Find the Frequency of “the” Word in a String

This is a C program to find the frequency of the word ‘the’ in a given sentence.

Problem Description

This program takes the sentence as input and finds the frequency of the word ‘the’ in a given sentence.

Problem Solution

1. Take any sentence as input.
2. Check for the word ‘the’ in the input sentence.
3. Use a variable to keep the count of number of ‘the’ in the sentence.

Program/Source Code

Here is source code of the C program to find the frequency of the word ‘the’ in a given sentence. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```

 *  C program to accept a string and find the number of times the word

```
 * 'the' appears in that string
```
```
 */
```
```
#include <stdio.h>
```
```
 
```
```
void main()
```
```
{
```

    int count = 0, i, times = 0, t, h, e, space;

```
    char string[100];
```
```
 
```
```
    puts("Enter a string:");
```
```
    gets(string);
```

   /*   Traverse the string to count the number of characters */

```
    while (string[count] != '\0')
```
```
    {
```
```
        count++;
```
```
    }
```

    /*   Finding the frequency of the word 'the' */

```
    for (i = 0; i <= count - 3; i++)
```
```
    {
```

        t =(string[i] == 't' || string[i] == 'T');

        h =(string[i + 1] == 'h' || string[i + 1] == 'H');

        e =(string[i + 2] == 'e'|| string[i + 2] == 'E');

        space =(string[i + 3] == ' ' || string[i + 3] == '\0');

        if ((t && h && e && space) == 1)

```
            times++;
```
```
    }
```

    printf("Frequency of the word 'the' is %d\n", times);

```
}
```

Program Explanation

1. Take any sentence as input and store it in the array string[].
2. If the input string has ‘t’, ‘h’, ‘e’ and ‘ ‘ consecutively, then store that values in the variables t, h, e and space respectively.
3. Use the variable times to count the number of ‘the ‘ in the input sentence. Increment the variable times if and only if the variables t, h, e and space have values in it.
4. Print the variable times as output and exit.

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Runtime Test Cases

Enter a string:
The gandhi jayanthi is celeberated on october 2 is the day
that he has born.
Frequency of the word 'the' is 2

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If you wish to look at other example programs on Strings, go to C Programming Examples on Strings. If you wish to look at programming examples on all topics, go to C Programming Examples.

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