2. Variables and types

Arithmetic

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Reading 1

Operators and integer division

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C++ uses + - * / and % (remainder).

If both operands are integers, / is integer division: it drops the fraction. 7 / 2 is 3, not 3.5.

If at least one operand is a double, / keeps a fractional part: 7.0 / 2 is 3.5.

% only works with integers: 7 % 2 is 1.

int a = 7, b = 2;
cout << a / b << endl;  // 3
cout << a % b << endl;  // 1

Check 2

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What does this print? int x = 7 / 2; cout << x;

Fill in 3

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Try it 4

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Run it, then change 7 and 2 to other integers.

main.cpp

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Program input (stdin)

Output will appear here.

Assignment 5

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Read one integer n and print n * 2, followed by a newline.

main.cpp

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