evalpp

Lightweight C++ mathematical expression evaluator.

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Features

• Arithmetic operators
• Bitwise operators
• Logical operators
• Comparison operators
• Ternary operator
• Mathematical functions
• Constants (pi, e)
• Single-header
• C++17
• No dependencies

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Installation

#include "evalpp.hpp"

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Usage

#include "evalpp.hpp"
#include <iostream>

int main() {

    std::cout << evalpp::eval("1+2*3") << '\n';

    std::cout << evalpp::eval("pow(2,5)") << '\n';

    std::cout << evalpp::eval("sin(pi/2)") << '\n';
}

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Supported Operators

Type	Operators
Arithmetic	+ - * / %
Bitwise	& | ^ ~ << >>
Logical	&& || !
Comparison	== != < <= > >=
Ternary	?:

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Supported Functions

Function	Example
sin(x)	sin(pi/2)
cos(x)	cos(0)
tan(x)	tan(1)
asin(x)	asin(1)
acos(x)	acos(1)
atan(x)	atan(1)
sqrt(x)	sqrt(25)
pow(x,y)	pow(2,10)
log(x)	log(e)
log10(x)	log10(100)
exp(x)	exp(1)
abs(x)	abs(-5)
floor(x)	floor(2.9)
ceil(x)	ceil(2.1)
round(x)	round(2.6)
min(...)	min(5,2,9)
max(...)	max(5,2,9)

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Constants

Constant	Value
pi	3.1415926535...
e	2.7182818284...

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Examples

evalpp::eval("1+2*3")
evalpp::eval("(1+2)*3")

evalpp::eval("5&3")
evalpp::eval("1<<4")

evalpp::eval("sin(pi/2)")
evalpp::eval("pow(2,10)")

evalpp::eval("5>3 ? 100 : 0")