C Programming

1. The statement which declares a character based array called letters of ten elements is,

letters : char[10]; char[10] letters; char letters[10]; char array letters[0..9];

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

letters[4] := "Z"; letters[3] = 'Z'; letters[3] = 'z'; letters[4] = "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.

Statement 1

	for( loop = 0, total = 0; loop >= 4; loop++ )
		total = total + numbers[loop];

Statement 2

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

Statement 3

	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]; balances[3][5] of float; float balances[5][3]; array of float balances[0..2][0..5];

5. Write a for loop to total the contents of the multidimensioned float array balances, as declared in question 4.

Statement 1

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

Statement 2

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

Statement 3

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

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

char words[10] = 'Hello'; static char words[] = "Hello"; static char words["hello"]; static char words[] = { Hello };

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

strcpy( stuff, 'Welcome' ); stuff = "Welcome"; stuff[0] = "Welcome"; strcpy( stuff, "Welcome" );

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

printf("%d\n", &totals[3] ); printf("%d\n", totals[3] ); printf("%c\n", totals[2] ); 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); printf("%c\n", words); printf("%d\n", words); printf("%s\n", words[2]);

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

scanf("%s\n", words); scanf(" %c", words); scanf("%c", 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.

Statement 1

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

Statement 2

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

Statement 3

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

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