Fundamentals of Computer Programming C++ Programs
Q1.
Add the code on the doted lines in the following program to generate the output
given after the source code.
Sol:
#include<iostream>
using namespace std;
int main()
{
int x=100;
float y=6.0;
float sum;
float product;
float m;
sum=x + y;
cout << "The
Sum of x and y is " <<sum<< endl;
product=x*y;
cout<<
"The product of x and y is " <<product<<endl;
m=x+y+100;
cout<<
"x+y+100="<<m<<endl;
return
0;
}
Q2. Find the output of the following on
your notebook then verify it through a C++ Program.
Sol:
#include<iostream>
using namespace std;
int main()
{
int
x,y,z,a,b,c,d,e,f,g;
x=7+4*2%6*4;
cout<<"1."<<x<<endl;
y=(7+4)*6%5*4;
cout<<"2."<<y<<endl;
z=7+((4*6)%5)*4;
cout<<"3."<<z<<endl;
a=4+6*2;
cout<<"4."<<a<<endl;
b=3+9/3*6;
cout<<"5."<<b<<endl;
c=6+(10-5)*2+10;
cout<<"6."<<c<<endl;
d=-(20/6)+(12-10)*5/2;
cout<<"7."<<d<<endl;
e=(20-10) /
(6+2) / (3/2);
cout<<"8."<<e<<endl;
f=-(20/6.7)+(12-10.0)*5.0/2;
cout<<"9."<<f<<endl;
g=(20-10.0) -
(6.6+2.2) / (3/2);
cout<<"10."<<g<<endl;
return
0;
}
Q.3 assume that int x=3, y=2, z=1; are
the values for all of the following expressions, then calculate the value of x
after each statement
Sol:
#include<iostream>
using namespace std;
int main()
{
int x=3,y=2,
z=1;
x+=y;
cout<<"1."<<x<<endl;
x-=y;
cout<<"2."<<x<<endl;
x+=y+z;
cout<<"3."<<x<<endl;
x/=y*z;
cout<<"4."<<x<<endl;
x*=y+z;
cout<<"5."<<x<<endl;
x*=y-6+z-2;
cout<<"6."<<x<<endl;
x%=4-y;
cout<<"7."<<x<<endl;
x+=3*5;
cout<<"8."<<x<<endl;
return
0;
}
Q4. Assume int x=0, y=4, z=10 for all
the statements
Calculate the value of the variables used in each statement.
Sol:
#include<iostream>
using namespace std;
int main()
{
int x=0, y=4,
z=10;
x=y++;
cout<<"1."<<x<<endl;
x=++y;
cout<<"2."<<x<<endl;
x=y--;
cout<<"3."<<x<<endl;
x= --y;
cout<<"4."<<x<<endl;
x=6-y++;
cout<<"5."<<x<<endl;
x=6- ++y;
cout<<"6."<<x<<endl;
x=6+y--;
cout<<"7."<<x<<endl;
x=6+ --y;
cout<<"8."<<x<<endl;
x= y++ + ++z;
cout<<"9."<<x<<endl;
x=y++ - --z;
cout<<"10."<<x<<endl;
x= --y + z--;
cout<<"11."<<x<<endl;
return
0;
}
Q5. Write a program that finds the sum of the individual digits in a three
digits number.
Sol:
#include <iostream>
using namespace std;
int main()
{
int num1, num2, r,
sum=0;
cout <<
" Input a number: ";
cin >> num1;
num2 = num1;
while (num1 > 0)
{
r = num1 % 10;
num1 = num1 /
10;
sum = sum + r;
}
cout << " The sum of digits of " << num2 <<
" is: " << sum << endl;
return 0;
}
Q6. Write a program that converts the
number of minutes to hours and minutes.
Sol:
#include <iostream>
using namespace std;
int main()
{
int h, m, s;
cout<<"Enter
numbers of minutes:";
cin>>m;
h=m/60;
cout<<"Hour
"<<h<<endl;
s=m%60;
cout<<"and
"<<s<<" minutes"<<endl;
return
0;
}
Q7. Write a program that inputs a
character and displays whether it is vowel or consonant using switch statement.
Sol:
#include <iostream>
using namespace std;
int main()
{
char ch;
cout<<"Enter any Alpabet\n";
cin>>ch;
switch(ch)
{
case 'a':
cout<<ch<<" is a vowel";
break;
case 'e':
cout<<ch<<" is a vowel";
break;
case 'i':
cout<<ch<<" is a vowel";
break;
case 'o':
cout<<ch<<" is a vowel";
break;
case 'u':
cout<<ch<<" is a vowel";
break;
//for upper case//
case 'A':
cout<<ch<<" is a vowel";
break;
case 'E':
cout<<ch<<" is a vowel";
break;
case 'I':
cout<<ch<<" is a vowel";
break;
case 'O':
cout<<ch<<" is a vowel";
break;
case 'U':
cout<<ch<<" is a vowel";
break;
default:
cout<<ch<<" is a consonant";
break;
}
return
0;
}
Q8. Write a program that inputs radius.
It calculates area of circle if user enters1 as choice. It calculates
circumference if the user enters 2 as choice. It displays error message in case
of any other choice.
Sol:
#include<iostream>
using namespace std;
#define pi 3.1416
int main()
{
float
r,aoc,coc;
cout<<"Enter
the radius:"<<endl;
cin>>r;
int choice;
cout<<"Enter
the choice \n1 for aoc\n2 for coc"<<endl;
cin>>choice;
if(choice==1)
{
aoc=3.1416*r*r;
cout<<"area
of circle"<<aoc<<endl;
}
else
if(choice==2)
{
coc=2*3.1416*r;
cout<<"area
of circumference"<<coc<<endl;
}
else
cout<<"something
went wrong"<<endl;
return
0;
}
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