Bracket error in c "error: expected identifier or '(' {"

July 19, 2022

I’m working on a problem set for CS50 in C but I keep getting an error readability.c:11:1: error: expected identifier or '(' { and I’m not sure what’s wrong. Any help would be much appreciated.

#include <cs50.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>

int count_letters(string text);

int main(void);
{
    string paragraph = get_string("Input text: ");

    count_letters(paragraph);

    int L = 0;
    int S = 0;

    int index = 0.0588 * L - 0.296 * S - 15.8;

    printf("%i", index);
}

int count_letters(string text)
{
    int letters = 0;

    for (int i = 0, length = strlen(text); i < length; i++)
        if isalpha(text[i]) {
            letters + 1
        }

    return letters;
}

>Solution :

You have a semicolon at

int main(void);

and you need one here:

for (int i = 0, length = strlen(text); i < length; i++){ //added {
  if(!(isalpha(text[i]) == 0)){ // is alpha in brackets too and I usually prefer to check result with proper types
    letters + 1; //addded ;
  }
}