Week 1 Exercises
12) Write C++ statements that accomplish the following:
a) Declare int variables x and y. Initialize x to 25 and y to 18.
int x, y;
x = 25;
y = 18;
b) Declare and initialize an int variable temp to 10 and a char variable ch to ‘A’.
int temp = 10;
char ch = ‘A’;
c) Update the value of an int variable x by adding 5 to it.
x += 5;
d) Declare and initialize a double variable payRate to 12.50.
double payRate = 12.50;
e) Copy the value of an int variable firstNum into an int variable tempNum.
tempNum = firstNum;
f) Swap the contents of the in variables x and y. (Declare additional variables, if necessary.)
z = x;
x = y;
y = z;
g) Suppose x and y are double variables. Output the contents of x, y, and the expression x + 12 /y -18.
cout << “x = “ << x << “y = “ << y << “x + 12 / y – 18 = “ << x + 12 / y -18 endl;
h) Declare a char variable grade and set the value of grade to ‘A’.
grade = ‘A’;
i) Declare int variables to store four integers.
int a, b, c, d;
j) Copy the value of a double variable z to the nearest integer into an int variable x.
x = int(z);
14) Suppose x, y, z and w are int variables. What value is assigned to each of these variables after the last statement executes?
x = 5, y = 2, z = 3, w = 9
16) Suppose x, y, and z are int variables and x = 2, y = 5, and z = 6. What is the output of each of the following statements? a) cout << “x = “ << x << ”, y = “ << y << “, z = << z << endl;
x = 2, y = 5, z = 6
b) cout << “x + y = “ << x + y , endl;
x + y = 7
c) cout << “Sum of “ << x << “ and “ << z << “ is “ << x + z << endl;
Sum of 2 and 6 is 8
d) cout << “z / x = “ << z / x << endl;
z / x = 3
e) cout << “2 times “ << x << “ = “ << 2 * x << endl;
2 times 2...
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