Question(1) Assume that a bool variable isQuadrilatera l has been declared , and

Question

Question(1)

Assume that a bool variable isQuadrilateral has been declared , and that an int variable , numberOfSides has been declared and initialized . Write a statement that assigns the value of isQuadrilateral to true if numberOfSides is exactly 4 and false otherwise.

Instructor Notes:

Hint: The result of evaluating a conditional expression is true/false, and can be assigned to bool variable, e.g.,

bool x = y == z;

Note == is the relational equality operator and = is the assignment operator. This statement will compare y and z to see if they are equal, which is either true or false. Then the true/false value will be assigned to Boolean variable x.

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Question (2)

Assume that a bool variable workedOvertime has been declared , and that an int variable hoursWorked has been declared and initialized . Write a statement that assigns the value of workedOvertime to true if hoursWorked is greater than 40 and false otherwise

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Question(3)

Write an if/else statement that compares the value of the variables soldYesterday and soldToday, and based upon that comparison assigns salesTrend the value -1 or 1.

-1 represents the case where soldYesterday is greater than soldToday; 1 represents the case where soldYesterday is not greater than soldToday.

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Question(4)

Assume that x is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if x is a letter.

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Question(5)

Assume that x is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if x is alphanumeric , that is either a letter or a decimal digit

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Question(6)

Assume that c is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if c is a space character

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Question(7)

Assume that x is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if x is NOT a upper-case letter

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Question(8)

Assume that x is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if x is NOT a letter.

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Question(9)

Assume that s is a string . Write an expression whose value is true if and only if the value of s would come between "mortgage" and "mortuary" in the dictionary.

Explanation / Answer

Note: Function available in c add header file #include <ctype.h>

Question(1)

bool isQuadrilateral = false

int numberOfSides =4

if (numberOfSides ==4)

isQuadrilateral = true

else

isQuadrilateral = false

Question (2)

bool workedOvertime = false

int hoursWorked =40

if(hoursWorked > 40)

workedOvertime =true

else

workedOvertime =false

Question(3)

int salesTrend =0

if(soldYesterday > soldToday)

salesTrend =-1

else

salesTrend =1

Question(4)

char x ='b'

bool trueChar=false

trueChar=true

else

trueChar=false

Question(5)

char x ='2'

bool alphNum=false

if(isalpha(x))

alphNum=true

else

alphNum =false

Question(6)

char c= ' '

bool charSpace=false

if(isspace(c))

charSpace=true

else

charSpace=false

Question(7)

if not uppercase should be lowercase

char x ='m'

bool lowCase=false

if(islower(x))

lowCase=true

else

lowCase=false

Question(8)

if is is not a letter x should be digit

char x ='2'

bool Num=false

if(isdigit(x))

Num=true

else

Num= false

Question(9)

we declare two string comparing the strings

string s;

string str1="mortgage"

string str2="mortuary"

boo betweenStr1N2=false

if(strstr(str1,s) && strstr(str2,s)) //strstr(str1,str2) checks for str2 in str1

betweenStr1N2=true

else

betweenStr1N2=false

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