sheet_03_ver13-a_selection structures and switch statements (1)

7/30/2019 Sheet_03_ver13-A_Selection Structures and Switch Statements (1)

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Department: Computer Engineering (Cairo Branch)Course Code:CC112Course : Structured ProgrammingSheet: 3Topics:Selection structures and switch statement

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Level 1:

Topic Program

If statement 1) Find the error in the following statements

If a == 5printf (Hello);

If ( a < b );printf (ok);

If ( x = y )printf (equal);

If ( t < r)x = 2 ;

t = r ;

else

printf

Float x;x = 2 ;

switch (x)

{

case ( 2 )

printf(Hello);

break;

}

Switch 2) What is the purpose of the default part of the switch command

Selection 3) The else and default parts of selection statements, are they optional or mandatory?

4) Write a program that takes two integers and displays their minimum.

Level 2:Topic Program

Tracing 5) Find the value of x for each of the following program segmentsa) Program segment 1

int x = 2 ;if ( x >= 0 )

x++;else

if ( x >= 1 )x += 10;

printf ( %d, x ) ;

b) Program segment 2int x = 2 ;if ( x >= 0 )

COLLEGE OF ENGINEERING & TECHNOLOGY


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x++;if ( x >= 1 )

x += 10 ;printf ( %d, x ) ;

6) What will be the value of x when y=12.0a) Program segment 1

float x = 25.0, y ;scanf ( %d, &y ) ;

if ( y != (x - 10.0 ) )x = x - 10.0 ;

elsex = x / 2.0 ;

printf ( x = %f, y = %f \n, x , y ) ;

b) Program segment 2float x = 25.0, y ;scanf ( %d, &y ) ;if ( y < 12.0 )

if ( y >= 0.0 )x = 5 * y ;

elsex = 2 * y ;

elsex = 3 * y ;

printf ( x=%f,y=%f\n, x, y);

Tracing /switch

7) What will be the value of y after the following switch statement is executed?x = 3 ;

switch (x+3){

case 6: y = 1 ;default: y += 1 ;

}

Switch 8) Use a switch statement to rewrite the following if statementif ( a == 1 )

x += 5 ;else if ( a == 2 )

x += 10 ;else if ( a == 3 )

x += 16 ;

else if ( a == 4 )x += 34 ;

If 9) Write a nested if statement to display a message that indicates the educational level of astudent based on his or her number of schooling:

0-none1 through 5-Elementary School6 through 8-Middle School9 through 12-High School>12- College.

Print a message to indicate invalid data as well.

10) Write a program that may be used to compute the area of a square (area=side2) or a triangle(area=0.5*base*height) after prompting the user to type the first character of the figurename (S or T). Enter required data according to the figure being handled.


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Selection 11) Write a C program read the student score and display the corresponding grade according tothe following table:

Score (x) Grade

85


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sheet_03_ver13-a_selection structures and switch statements (1)

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