Write a C program to find last occurrence of a word in given string using loop. How to find last occurrence of a word in given string using loop in C programming. Program to search last index of a given word in a string in C.
Example:
Input string: I love programming. I love CodeforWin.
Input word: love
Output last index: 22
Before moving on to this It is recommended that you must know how to find last occurrence of a character in given string and how to search for a word in a string. As logic to this program is depended upon both the above programs.
Happy coding ;)
Example:
Input string: I love programming. I love CodeforWin.
Input word: love
Output last index: 22
Required knowledge
Basic C programming, Loop, StringBefore moving on to this It is recommended that you must know how to find last occurrence of a character in given string and how to search for a word in a string. As logic to this program is depended upon both the above programs.
Program to find last occurrence of word in string
/**
* C program to find last occurrence of a word in given string
*/
#include <stdio.h>
#include <string.h>
#define MAX_SIZE 100 //Maximum size of string
int main()
{
char string[MAX_SIZE];
char word[MAX_SIZE];
int i, j, index, found;
int stringLen, wordLen;
/*
* Reads string and word from user
*/
printf("Enter any string: ");
gets(string);
printf("Enter any word to search: ");
gets(word);
index = -1;
stringLen = strlen(string); //Finds length of string
wordLen = strlen(word); //Finds length of word
/*
* Runs a loop from starting index of string to
* length of string - word length
*/
for(i=0; i<stringLen - wordLen; i++)
{
//Matches the word at current position
found = 1;
for(j=0; j<wordLen; j++)
{
//If word is not matched
if(string[i+j] != word[j])
{
found = 0;
break;
}
}
//If word have been found then store the current found index
if(found == 1)
{
index = i;
}
}
if(index == -1)
{
printf("'%s' not found.\n", word);
}
else
{
printf("Last index of '%s' : %d\n", word, index);
}
return 0;
}
Output
Enter any string: I love programming. I love CodeforWin.
Enter any word to search: love
Last index of 'love' : 22
Enter any word to search: love
Last index of 'love' : 22
Happy coding ;)
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