Need help with checking last 3 letters in string

**nekinebitanlik** · 11-10-2017

Hello everybody frist i need to say that am proud that i become member of this community i saw some posts from 2001 and its crazy 16 years :O GOOD JOB!!

I have one question i have to do a task for my studies
task is:
input :
____________
____________
____________
____________

four lines of strings ( song lyrics )

and i need to check last three words of every line then check if frist line and thrid line have the same last three words? I know how to check last word (strlen(char name)-1)
but how for three?

I apologize if the questions are stupid and unclear but i am begginer!
EDIT: One more thing when i check which is last how can i save it in variable?

**~~userxbw~~** · 11-10-2017

brush up on loops, and control values, keeping count of something, how to keep count of something, if statements. and maybe take a break even.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main (void)
{
    
    char *letters = "11 22 32 4 5 6 7 8 hello";
    char saved_1_char[2];

    int len = strlen(letters);
    for ( ; len + 1 ; )  
    {
        printf("%c\n", letters[len]);
        if ( letters[--len] == 'e')
             saved_1_char[0] = letters[len];
    }
   printf("saved a char %c\n", saved_1_char[0]);
        
    return 0;
 
}

posting your code on what you got so far is highly recommended.

**Matticus** · 11-10-2017

Originally Posted by nekinebitanlik

and i need to check last three words of every line then check if frist line and thrid line have the same last three words?

First you have to figure out how to isolate the last three words of a given line. Perhaps start at the end of a line and work your way backwards.

Originally Posted by nekinebitanlik

EDIT: One more thing when i check which is last how can i save it in variable?

You can use strcpy to copy a string. If you understand arrays and '&', you can pick where you want the string copy to begin from.

**whiteflags** · 11-10-2017

You could save all of the positions in the string where there is a space. Assuming that there is only one space between words and that every line ends with \n, every space is where a word starts. Then, finding the third to last word and such in the text is trivial.

**nekinebitanlik** · 11-11-2017

Thanks for responding. I didnt post code cause i didnt write anything, i STILL dont have idea how to compare last three words in frist row with last three words in thrid row.. i know i am unclear so i will try to explain better:

Console input and output is italic

Enter four sentence:

The condition of being abducted
I love my mom
I got connected
I love my dad

///so frist and thrid sentence ending on ted

Great job !

**jack jordan** · 11-11-2017

If this is helpful to you, this is a way to extract words:

Code:

#include <stdio.h>
 
int main(void) {
	char line[100];
	fgets(line, 100, stdin);
	/* or do this:
	char line[100] = "this is a sentence"
	*/
	char words0[10][20];
	char *token = strtok(line, " \n");
	for (int i = 0; i < 10 && token != NULL; ++i) {
		token = (NULL, " \n");
	}
}

Thread: Need help with checking last 3 letters in string

Thread Tools

Search Thread

Display

Need help with checking last 3 letters in string

Similar Threads

Need help converting letters in a string

Adding a string with another string to get the output of the letters added?

counting letters in string

Error checking for capital letters, hyphens and apostrophes

Checking for letters

Tags for this Thread