Question

Write a C program RemoveWord.c that can remove a word from a given string (i.e. a line) entered by the user

Sample output is as following:
Please enter a string: This is the last homework.
Please enter the word to be removed: is
Result: This the last homework.

Hint: The C library function gets reads a line from stdin and stores it into the string pointed to by str. char *gets(char *str)

Answer 1

I have written the c code based on the requirement given in the question

Please read the inline comment given inside the code, this explains the code functionality

All the comments are hightlighted in bolder text

************************C Code***********************

#include <stdio.h>

#include <string.h>

// Declared maximum string size

#define MAX_SIZE 100

// Function declaration

void RemoveWord(char * userInput, char * wordToRemove);

int main()

{

char userInput[MAX_SIZE];

char wordToRemove[MAX_SIZE];

//Input string and word from user

printf("Please enter a string: ");

gets(userInput);

printf("Please enter the word to be removed: ");

gets(wordToRemove);

  

//Call the remove word method to remove the wordToRemove

//that user entered

RemoveWord(userInput, wordToRemove);

printf("\nResult: %s", userInput);

return 0;

}

//This method removes the occurrences of a given word in string.

void RemoveWord(char * userInput, char * wordToRemove)

{

int i, j, inputWordLength, removeWordLength;

int found;

// Length of the user input string

inputWordLength = strlen(userInput);   

// Length of word that need to remove

removeWordLength = strlen(wordToRemove);

//For loop to match the word to remove from user input string

for(i=0; i <= inputWordLength - removeWordLength; i++)

{

//Match word with string

found = 1;

for(j=0; j<removeWordLength; j++)

{

if(userInput[i + j] != wordToRemove[j])

{

found = 0;

break;

}

}

//If the word is not found

if(userInput[i + j] != ' ' && userInput[i + j] != '\t'

&& userInput[i + j] != '\n' && userInput[i + j] != '\0')

{

found = 0;

}

//If word is found then shift all characters to left

//and decrement the string length

if(found == 1)

{

for(j=i; j<=inputWordLength - removeWordLength; j++)

{

userInput[j] = userInput[j + removeWordLength];

}

inputWordLength = inputWordLength - removeWordLength;

//Match the next occurrence of word from the current index.

i--;

}

}

}

*****************END*******************

Output Screen

Please enter a string: This is the last homework Please enter the word to be removed: the Result: This is last homework Program finished with exit code 0 Press ENTER to exit console