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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