What does a/b mean in c++

In C, a/b represents the quotient of a divided by b, and the result is a floating point number. If a and b are both integers, round down. The result type is determined by the operand types: a/b is of type int, float, or double, depending on the types of a and b.

The meaning of a/b in C

In C, a/b means a divided by b business.

Details

• The result of the a/b operation is a floating point number, even if a and b are both integers.
• If b is 0, the result of a/b is undefined (that is, a runtime error is generated).
• If a and b are both integers, the result of a/b is rounded down (that is, the decimal part is discarded).

Type rules

The result type of a/b is determined by the type of the operand:

• If both a and b is of type int, the result is of type int.
• If a and b are both float or double, the result is a floating point type.
• If a is of type int and b is of type float or double, the result is of type floating point.

Example

int a = 10, b = 2;
float c = a / b;  // c 为 5.0（向下取整）

Note

In some cases, using floating point operations may produce rounding Enter error. Therefore, if exact integer division is required, it is better to use the modulo operator (%).

int remainder = a % b;  // 0

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