C-Programming Chapter 2

Definitions can appear anywhere in the body of a function. T or F?

False a variables definition must appear before its first use in the code.

Use the statements wrote in 2.4 to write a complete program that calculates the product of three integers.

Good Luck.

Function printf always begins printing at the beginning of a new line. T or F?

False always begins printing wherever the cursor is currently located

All variables must be given a type when they're defined. T or F?

True

The escape sequence \n when used in a printf format control string causes the cursor to position to the beginning of the next line on the screen. T or F?

True

The remainder operator can only be used with integer operands. T or F?

True

Whenever a new value is placed in a memory location, that value overrides the previous value in that location. This process is said to be __________.

destructive

Define the variables c, thisVariable, q76354, and number to be of type int.

int c, thisVariable, q76354, number;

Define the variables x, y, z and result to be of type int.

int x, y, z, result;

The escape sequence \n represents the __________ character, which causes the cursor to position to the beginning of the next line on the screen.

newline

Prompt user to enter an integer. End your prompting message with a colon : followed by a space and leave the cursor positioned after the space.

printf( "Enter an integer: " );

Prompt the user to enter three integers.

printf( "Enter three integers: ");

Print "The product is" followed by the value of the integer variable result.

printf( "The product is %d\n", result );

Print the message "This is a C program." on one line

printf( "This is a C program.\n" );

The __________ standard library function displays information on the screen.

printf.

Compute the product of the three integers contained in variables x, y, and z and assign the result to the variable result.

result = x * y * z;

State that a program will calculate the product of three integers.

// Calculate the product of three integers

All arguments following the format control string in a printf function must be preceded by an ampersand (&). T or F?

False arguments in a printf function ordinarily should not be preceded by an &. Arguments following the format control string in a scanf function ordinarily should be preceded by an &.

If number is not equal to 7, print "The variable number is not equal to 7."

If ( number != 7 ) { printf( "The variable number is not equal to 7.\n" ); }

Every functions body begins with _________ and ends with ________.

Left brace Right brace

All variables must be defined before they are used. T or F?

True

The _________ statement is used to make decisions.

if

Correct the errors if ( c < 7 ); { printf( "C is less than 7\n" ); }

Remove the first semicolon after the first right parenthesis

The _________ standard library function is used to obtain data from the keyboard.

scanf.

C considers the variables number and NuMbEr to be identical. T or F?

False C is case sensitive.

Read an integer from the keyboard and store the value entered in integer variable a.

scanf( "%d", &a );

Read three integers from the keyboard and store them in the variables x, y, and z.

scanf( "%d%d%d", &x, &y, &z );

The conversion specifier ________ is used in a scanf format control string to indicate that an integer will be input and in a printf format control string to indicate that an integer will be output.

%d

Every C program begins execution at the function ________.

main

Correct the errors scanf( "%d%d", &number1, number2 );

Add & to number2

When a value is read from a memory location, the value in that location is preserved; this process is said to be __________.

nondestructive

Correct the errors if ( c => 7 ) { printf( "C is greater than or equal to 7\n" ); }

=> is not an operator in C it should be changed to >=

Correct the errors printf( "The value is %d\n", &number );

Delete &

A program that prints three lines of output must contain three printf statements. T or F?

False A printf statement with multiple \n escape sequences can print several lines.

The arithmetic operators *, /, %, +, and - all have the same level of precedence. T or F?

False The operators *, /, and % are on the same level of precedence, and the operators + and - are on a lower level of precedence.

Comments cause the computer to display the text after // on the screen when the program is executed. T or F?

False comments do not cause any action to be performed when the program is executed. They're used to document programs and improve their readability.

Every statement ends with a(n) __________.

Semicolon

Print the message "This is a C program." on two lines so that the first line ends with C.

printf( "This is a C\nprogram.\n" );

Print the message "This is a C program." with each word on a separate line.

printf( "This\nis\na\nC\nprogram.\n" );

Print the message "This is a C program." with each word separated by a tab.

printf( "This\tis\ta\tC\tprogram.\n" );