11A-5 / 544
COMP151 INTRODUCTION TO ALGORITHMS AND PROGRAMMING
ANSWERS FOR ASSIGNMENT – III
/College of Arts and Sciences
Department of Mathematical and Physical ScienceSection: Computer Science
Semester: Spring-2013
1. Find the result for the following expressions - 4Marks
Expression / Result5+2*4 / 13
10/2-3 / 2
8+12*2-4 / 28
4+17%2-1 / 4
6-3*2+7-1 / 6
6+3*5 / 21
12/2-4 / 2
9+14*2-6 / 31
5+19%3-1 / 5
(6+2)*3 / 24
14/(11-4) / 2
9+12*(8-3) / 69
(6+17)%2-1 / 0
(9-3)*(6+9)/3 / 30
12+22%4*4+12-6/2 / 29
45+2*3*4%2-3+72 / 114
2. True or False: It’s perfectly all right to use variables of different data types in the same arithmetic expression -1 Mark
(FALSE)
3. An arithmetic assignment operator combines the effect of what two operators? -1 Mark
1. ARITHMETIC OPERATORS (+,-,*,/,%)
2. ASSIGNMENT OPERATOR (=)
4. Convert the following Algebraic Expression into C++ Expression -2 Marks
Algebraic Expression / C++ Expression/ a/(b*c)
/ (k*a*(t1-t2))/b
/ b*b-4*a*c or (b*b)/(4*a*c)
/ ((a*a)+1)/(b*c)
/ 1/(1+(x*x))
/ (a+b)/(c+d)
5. Write a statement that uses an arithmetic assignment operator to increase the value of the variable temp by 23. Write the same statement without the arithmetic assignment operator. - 2 Marks
temp+=23;
temp=temp+23;
6. Write a program to check the given number is less than 100 or greater than 100 by using ternary operator. - 2 Marks
#include<iostream>
using namespace std;
int main()
{
int n;
cout<”Enter the value for Number”<endl;
cin>n;
(n<100)?cout<”The number is less than 100”:cout<”The number is greater than 100”;
return(0);
}
7. Write a program to find the biggest among three numbers through conditional operator. - 2 Marks
#include<iostream>
using namespace std;
int main()
{
int x,y,z;
cout<”Enter the value for x,y and z”<endl;
cin>x>y>z;
((x>y)?((x>z)?cout<”X is big”:cout<”Z is big”):((y>z)?cout<”Y is big”:cout<”Z is big”));
return(0);
}
8. What is the output of the following program? - 2 Marks
#include<iostream>
using namespace std;
int main()
{
int x=10,y=25,c,d;
c=++x;
cout<"Value of x is"<x<endl;
cout<"Value of x is"<x<endl;
cout<"Value of c is"<c<endl;
d=y++;
cout<"Value of y is"<y<endl;
cout<"Value of y is"<y<endl;
cout<"Value of d is"<d<endl;
c++;
cout<"Value of c is"<c<endl;
++d;
cout<"Value of d is"<d<endl;
cout<"Value of x is"<x++<endl;
cout<"Value of x is"<x<endl;
cout<"Value of y is"<++y<endl;
cout<"Value of y is"<y<endl;
cout<"Value of x is"<--x<endl;
cout<"Value of x is"<x<endl;
cout<"Value of y is"<y--<endl;
cout<"Value of y is"<y<endl;
return(0);
}
Output:
Value of x is11
Value of x is11
Value of c is11
Value of y is26
Value of y is26
Value of d is25
Value of c is12
Value of d is26
Value of x is11
Value of x is12
Value of y is27
Value of y is27
Value of x is11
Value of x is11
Value of y is27
Value of y is26
9. Evaluate the following expression. - 3 Marks
Assume p=4,q=2,r=6,s=8,t=5
Expression / ResultA=s*p/q+r-t+s%q+(r*t)/p+(s+q) / 34
A=(s*r)/(p+q)%t*r+s*(r%4)+s/t / 35
A=t*p*q/s%r+(s*t)/2 / 25
A++ / 26
A=p*q*r*s*t%(p+q)/(s-q)+p+t+s / 17
A=p+t+(q*r)%2-t / 4
A=q/1+p*(t%3)/r/s+7 / 9
A=p+q+t-(s%q)+t*2+p+t*2 / 35
++A / 36
10. Evaluate the following expression. -3 Marks
Assume a=6,b=2,c=8,d=7
Ch=’A’, t=’X’, m=’K’
Expression / Result‘X’==m / 0 or false
(a>=b)&(c!=b) / 1 or true
(d<b)||(m!=t) / 1 or true
(Ch==’A’)||(t==’E’)||(c>=0) / 1 or true
(a+=b)==c / 1 or true
d%=b / 1
!((a*=5)>c) / 0 or false
(c-=a)!=a / 1 or true
(d>b)&(c<a)&(m==’k’) / 0 or false
11. If a is 5, b is 10, c is 15 and d is 0 what are the truth values of the following expressions? -2 Marks
a). c==a+b - true
b). a!=7 - true
c). b<=a - false
d). a>5 - false
e). a+d>=c-b - true
f). d/a<c*b - true
12. If a is 5, b is 10, c is 15 and d is 0 what are the truth values of the following expressions? -2 Marks
a). c==a+b||c==d - true
b). a!=7&c>= 6||a+c<= 20 - true
c). !(b<=12)&a%2==0 - false
d). !(a>5)||c<a+b - true
13. True or False? -4 Marks
a).A condition or logical expression is an expression that can only take the values false or true. - true
b).A relational expression is constructed from arithmetic expressions combined by the relational operators less than, greater than, equal, not equal, greater than or equal and less than or equal. - true
c).A logical expression is constructed from relational expressions by use of the logical operators not, and and or. - true
d).sizeof() operator accepts one parameter, which can be either a type or a variable itself and returns(integer) the size in bytes of that type or object - true
1