程序不产生任何输出

Question

I tried writing a code that gets up to 10 words, and if everything is a pangram it prints that it's a pangram. The thing is about this code is that even if the user enters 7 words that are a pangram, the for loop needs to stop and print that the sentence formed out of this words is indeed a pangram. I wrote the code and it compiles just fine, the problem is the exe file, I try to execute it and it doesn't work. Can you guys help me? my code:

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

#define MAX_WORDS 10
#define MAX_WORD_LENGTH 10
#define TEN 10

int main(void)
{
    int i = 0;
    int j = 0;
    int k = 0;
    int p = 0;
    int flag = 0;
    int counter = 0;

    char words[MAX_WORDS][MAX_WORD_LENGTH] = { 0 }; 

    for(i = 0; i < TEN; i++)
    {

        flag = 0;
        fgets(words[i], MAX_WORDS, stdin);
        //inputs the name
        if(words[i][strlen(words[i])-1] == '\n')
        {
            words[i][strlen(words[i])-1] = 0;
        }
        //makes sure there is no problem
        for(p = 0; p <= i; p++)
        {   
            for(k = 97; k < 123; k++)
            {
                for(j = 0; j < strlen(words[i]); j++)
                {
                    if(k == words[i][j])
                    {
                        flag = 1;
                    }

                }

            }       

        }
        if(flag)
        {
            counter++;
        }
        if(counter == 26)
        {
            i = 10;
            printf("It's a pangram?\nYes!");
        }
    }





    return 0;

}

Answer 1

Here is what missing in your code. You forgot to add the break statement after setting the flag. And incrementing the counter should be part of words iterating for loop.

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

#define MAX_WORDS 10
#define MAX_WORD_LENGTH 10
#define TEN 10

int main(void)
{
    int i = 0;
    int j = 0;
    int k = 0;
    int p = 0;
    int flag = 0;
    int counter = 0;

    char words[MAX_WORDS][MAX_WORD_LENGTH] = { 0 }; 

    for(i = 0; i < TEN; i++)
    {
        flag = 0;
        fgets(words[i], MAX_WORDS, stdin);
        //inputs the name
        if(words[i][strlen(words[i])-1] == '\n')
        {
            words[i][strlen(words[i])-1] = 0;
        }
        //makes sure there is no problem
        for(p = 0; p <= i; p++)
        {   
            for(k = 97; k < 123; k++)
            {
                for(j = 0; j < strlen(words[i]); j++)
                {
                    if(k == words[p][j])
                    {
                        flag = 1;
                        break;
                    }

                }
                if(flag)
                {
                    counter++;
                }
            }       

        }
        if(counter == 26)
        {
            i = 10;
            printf("It's a pangram?\nYes!");
        }
    }
    return 0;
}

Answer 2

As pointed out in the comments, you should try to debug the code yourself first.

For starters, I would stick a printf at the beginning of the for(i = 0; i < TEN; i++) loop to ensure the code is actually being executed. Of course you can put it in every single other loop to get some idea where the code is going.

One mistake I'm noticing is in here: fgets(words[i], MAX_WORDS, stdin); . The second parameter to fgets is expected to be the max word length and not the maximum number of words.