CS2010 - Set 1

Set one

Declare an identifier capable of holding a whole number

int number;

Declare an identifier capable of holding a series of letters

#include <string>

string text;

Declare an identifier capable of holding the value Pi

const double PI = 3.14159;

Declare an array variable capable of holding prices of items in a store

double prices[100];

List operators in order of precedence, including rational operators and logical operators

Parentheses (highest), Unary, multiplication, additive, Relational, Equality, Logical AND (&&) ( , Logigcal OR ( | | ), Assignment (=,+=)

For loop, iterate 109 times (start doesn’t matter):

for (int i = 0; i < 109; ++i)

100 iterations, even values starting from 0:

for (int i = 0; i < 200; i += 2)

Sentinel-controlled while loop until -1:

int val;
while (cin >> val && val != -1)

While loop: read file until EOF and count items:

ifstream in("in.dat");
int x, count = 0;
while (in >> x) { ++count; }

Do-while input validation (0–100 inclusive):

int num;
do {
    cout << "Enter 0–100: ";
    cin >> num;
} while (num < 0 || num > 100);