Question

1. what will the following programs print on the screen?

a) #include <iostream>
using namespace std;
int main()
{
int freeze = 32, boil = 212;
freeze = 0;
boil = 100;
cout << freeze << endl << boil << endl;
return 0;
}
b) #include <iostream>
using namespace std;
int main()
{
int x = 0, y = 2;
x = y * 4;
cout << x << endl << y << endl;
return 0;
}
c) #include <iostream>
using namespace std;
int main()
{
cout << \i am the incredible\;
cout << \computing\
machine\;
cout << \\
and i will\
amaze\
\;
cout << \you.\;
return 0;
}
d) #include <iostream>
using namespace std;
int main()
{
cout << \be careful\
\;
cout << \this might\
be a trick \;
cout << \question\
\;
return 0;
}

Explanation:

Part A

Step1: Analyze variable assignments

First, freeze is initially set to 32, then reassigned to 0. boil is initially 212, then reassigned to 100.

Step2: Output the values

The cout statement prints freeze (0) followed by a new line, then boil (100) followed by a new line.

Step1: Analyze variable assignments

x is initially 0, y is 2. Then x is set to y 4 (2 4 = 8). y remains 2.

Step2: Output the values

The cout prints x (8) then a new line, then y (2) then a new line.

Step1: Analyze each cout

• First cout: prints "I am the incredible"
• Second cout: prints "computing" then a new line (due to `

`), then "machine"

• Third cout: prints a new line (due to `

), then "and I will", then a new line (due to
), then "amaze", then a new line (due to
`)

• Fourth cout: prints "you."

Step2: Combine the outputs

Putting it all together with the new lines as per `
`.

Answer:

0
100

Part B