Text processing. Deleting words not starting with vowels

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I am reading content from a file to be read into a char array in C. How could I delete words which are uppercase // or which start with a non-vowel? I really cant understand how to save the last c ==> how to check if you have space before vowel.

int main ()
{
    FILE* read_me = fopen("x.txt", "r");
    if (!read_me)
    printf ("NERA");
    FILE* write_me = fopen("y.txt", "w");
    char c;
    while ((c=fgetc(read_me)) != EOF && c != EOF)
    if(trink(c) == 0)
    {
        fputc(c, write_me);
    }
    {
        XXX
    }
    fclose (read_me);
    fclose (write_me);
}

int trink (char w)
{
    switch(w) {
    case 'a':
    case 'A':
    case 'e':
    case 'E':
    case 'i':
    case 'I':
    case 'o':
    case 'O':
    case 'u':
    case 'U':
      return 1;
    default:
      return 0;
}
}

What I have tried:

XXX part is unknown. Could you help me to sove this problem.

Posted 27-Oct-16 6:24am

Member 12819728

Updated 27-Oct-16 10:18am

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Chris Maunder 27-Oct-16 14:32pm

Forget coding for a moment, have you tried solving this on paper?

2 solutions

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Member 12819728 · Answer 1 · 2016-10-27T07:39:00

Solution 2

Yes indeed, in my opinion I should find a vowel and if we have space before it its TRUE, when we skip everything till other space. And this process continuous

Posted 27-Oct-16 7:39am

Member 12819728

Comments

jeron1 27-Oct-16 15:23pm

How about find a space then check to see if there is a vowel after?

Member 12819728 27-Oct-16 15:57pm

But how to check if there is a vowel after?

jeron1 27-Oct-16 16:45pm

Read the next character (provided there is one). See CPallini's post for a good and straight forward suggestion. Coding will another matter though, based on what you posted. Go in small increments if possible and use a debugger to see what your program is doing. It is difficult at best, to debug your code without one.

CPallini · Answer 2 · 2016-10-27T10:18:00

Solution 3

A simple solution would be using a variable containing current state as either

Processing a valid word.
Processing blanks.
Processing a to-be-skipped word.

Then, based on current state and next char, your program could establish correctly what to do.

Posted 27-Oct-16 10:18am

CPallini

Comments

Member 12819728 28-Oct-16 3:07am

I cannot understand how to check next char, without destroying system

jeron1 28-Oct-16 10:10am

Destroying system how? You have a state, based on the character you just read. You read the next character and decide what to do based on the state. Once you've decided what to do and processed that character, you see if the state needs to be changed. Then the process starts over by reading the next character.

Member 12819728 30-Oct-16 8:41am

Could you help me to finish that code?

jeron1 31-Oct-16 10:47am

Kind of sounds like you're not understanding the algorithm involved. Perhaps write pseudocode (not terribly detailed or code dependent) first or create a flow chart, then try and code it up.

0. Set state = PROCESSING_BLANKS.
1. Read character.
a. If state == PROCESSING_BLANKS, (if not go to #2)
a. is character == BLANK?, if so go back to #1
b. is character == VOWEL? if so set state == PROCESSING_VALID_WORD, go back to #1.
c character is not a vowel, set state to PROCESSING_WORD_TO_BE_SKIPPED, go back to #1.

2. If state == PROCESSING_VALID_WORD, if not go to #3.
a. is character == BLANK, if so write the character out and set state to PROCESSING_BLANKS, go back to #1.
b. if character != BLANK, write it out, go back to #1.

You can probably figure the rest, note that the go to lines can be accomplished using loop and conditional constructs. The use of goto's tend to be looked down upon as their overuse can make code difficult to read.