C Programming

Answers: Practise Exercise 7: Arrays

1. Declare a character based array called letters of ten elements

	char letters[10];

2. Assign the character value 'Z' to the fourth element of the letters array

	letters[3] = 'Z';

3. Use a for loop to total the contents of an integer array called numbers which has five elements. Store the result in an integer called total.

	for( loop = 0, total = 0; loop < 5; loop++ )
		total = total + numbers[loop];

4. Declare a multidimensioned array of floats called balances having three rows and five columns.

	float balances[3][5];

5. Write a for loop to total the contents of the multidimensioned float array balances.

	for( row = 0, total = 0; row < 3; row++ )
		for( column = 0; column < 5; column++ )
			total = total + balances[row][column];

6. Assign the text string "Hello" to the character based array words at declaration time.

	static char words[] = "Hello";

7. Assign the text string "Welcome" to the character based array stuff (not at declaration time)

	char stuff[50];
	
	strcpy( stuff, "Welcome" );

8. Use a printf statement to print out the third element of an integer array called totals

	printf("%d\n", totals[2] );

9. Use a printf statement to print out the contents of the character array called words

	printf("%s\n", words);

10. Use a scanf statement to read a string of characters into the array words.

	scanf("%s", words);

11. Write a for loop which will read five characters (use scanf) and deposit them into the character based array words, beginning at element 0.

	for( loop = 0; loop < 5; loop++ )
		scanf("%c", &words[loop] );