C Exam Questions

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C Exam Questions#

2021 AA#

1.a(15) Write a program that gets a number of command line’s arguments from the user, the program has to print the number of arguments (excluding the name of the program) that as a string they are 1 char long.

2.b(15)

Given the below linked list:

typedef struct list_t {
      int val;
      struct list_t* next;
} LIST;

Write a function concat the receives 2 pointers to non empty linked lists, and concatenates the second LL to the end of the first one, no need to return anything.

3.c(15)

Write a function called create, that gets a natural number n and returns a pointer called a, the pointer should point to a data structure that stores n*n integers, and it’s elements are accecible using this syntaxt a[i][j] (i,j are between 1-n) and all values are initialized to 0.

Solution

void main(int argc, char* argv[])
{
	int count = 0;
	for (int i = 1; i < argc; ++i)
	{
		char* arg = argv[i];
		if(arg[1] == '\0')
		{
			count++;
		}
	}

	printf("%d\n", cou);
}


void concat(LIST* a, LIST* b)
{
	while (a->next != NULL)
	{
		a = a->next;
	}

	a->next = b;
}

int** create(int n)
{
	int i, j;
	int **vals = (int**)malloc(n * sizeof(int*));
	assert(vals);
	for (i = 0; i < n; i++)
	{
		int* m = (int*)malloc(n * sizeof(int));
		assert(m);
		for (j = 0; j < n; j++)
		{
			m[j] = 0;
		}
		vals[i] = m-1 ;
	}


	return vals-1;
}
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