Question
Programming Exercise 1: Sum of Twenty
Write a C program that reads in 20 positive integer values from a file called testdata1 and computes their sum, and then prints the value of the sum onto the screen. Your program should not use 20 distinct variables. Your program should not use an array, even if you may know how to manipulate arrays.

Programming Exercise 2: Positive, Negative, or Zero?
Write a C program that reads a single integer number from the keyboard via the scanf function, determines if the number is either, positive, zero, or negative and then prints out the exact message: “The number is positive.” or “The number is zero.” or “The number is negative.”

Programming Exercise 3: Using the sqrt Function
Write a C program that asks the user to enter a floating point number from the keyboard and then prints out the square root of that number. You should call the sqrt function. You should know that the sqrt function definition is located in the run-time library libm.a and you must use the -lm flag when you try to build the executable image via the gcc utility.

Programming Exercise 4: Count Characters
Write a program that counts the characters entered into the program from the keyboard until EOF is reached. Use the getchar function. Your program should output the number of characters entered. Remember EOF is not an ASCII character. How do you generate EOF from a keyboard?

Programming Exercise 5: Solid Box of Asterisks
Write a C program that accepts two positive integer values from the keyboard, say L and H. Both L and H will be less than 21. Your program then prints out a solid box of asterisks, with L horizontal stars and H vertical stars. The box is filled with asterisks. For example, if you were to type in 5 and 3, your output would be:
*****
*****
*****
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#include <stdio.h>


int main(int argc, char* argv[]) {
    int value; /* input value */
    int sum; /* sum of all input */
    int i; /* counter */
    FILE * in; /* input stream */
   
    in = fopen("testdata1", "r");
    if (in != NULL) { /* file can be accessed */
       sum = 0; /* init value of sum */      
       for (i = 0; i < 20; ) {
            /* read from file */
            fscanf(in, "%d", &value);
            if (value >= 0) { /* test for positive integer */
                i++; /* increase counter */
                sum += value; /* add value to the sum */
            }
       }      
       /* print the value of sum to screen */
       printf("%d\n", sum);
       /* close the input stream */
       fclose(in);
    }      
   
    return 0;
}
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        Backtrace
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        • 15. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
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        Backtrace
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        • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 19. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
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        1.42mstwenty4_siteHomeworkLibraryController.php#97
        Backtrace
        • 21. app/Http/Controllers/HomeworkLibraryController.php:97
        • 22. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 23. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 24. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
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        1.02mstwenty4_siteHomeworkLibraryController.php#97
        Backtrace
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        • 22. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 23. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
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        1.03mstwenty4_siteHomeworkLibrary.php#201
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        Backtrace
        • 20. app/Models/HomeworkLibrary/HomeworkLibrary.php:201
        • 26. app/Http/Controllers/HomeworkLibraryController.php:105
        • 27. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 28. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 29. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
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        Bindings
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        Backtrace
        • 14. app/Repositories/HomeworkLibraryRepository.php:30
        • 15. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 16. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 18. app/Repositories/HomeworkLibraryRepository.php:39
        • 19. app/Http/Controllers/HomeworkLibraryController.php:139
      • select * from `subjects` where `subjects`.`id` in (16)
        1.97mstwenty4_siteHomeworkLibraryRepository.php#30
        Backtrace
        • 19. app/Repositories/HomeworkLibraryRepository.php:30
        • 20. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 21. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 23. app/Repositories/HomeworkLibraryRepository.php:39
        • 24. app/Http/Controllers/HomeworkLibraryController.php:139
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` = 26805 and `solutionslibrary_files`.`solutionlib_id` is not null and `publish` = 'question' order by `order` asc, `id` asc
        1.2mstwenty4_siteHomeworkLibrary.php#260
        Bindings
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        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
        • 16. app/Transformers/HomeworkLibrary/HomeworkLibraryTransformer.php:58
        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
        • 20. vendor/league/fractal/src/TransformerAbstract.php:107
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        1.24mstwenty4_siteHomeworkLibrary.php#260
        Bindings
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        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
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        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
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        1.16mstwenty4_siteHomeworkLibrary.php#260
        Bindings
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        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
        • 16. app/Transformers/HomeworkLibrary/HomeworkLibraryTransformer.php:80
        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
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        Backtrace
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