C++ Program to Illustrate the Order of Evaluation
C++
#include <iostream> using namespace std; int getValue() { return 42; } int main() { int a = 0; int b = a++ + getValue(); cout << "a: " << a << endl; cout << "b: " << b << endl; return 0; } |
Output
a: 1 b: 42
Explanation
In the above example, we have an expression a++ + getValue(), first the value of a is used in the operation then the value of a is incremented and getValue() returns a value. The order of evaluation determines whether a++ or getValue() is evaluated first. In C++17, the order of evaluation is left-to-right, so a++ is evaluated before getValue().
Order of Evaluation in C++17
In C++ programming, the order of evaluation of expressions can have a significant impact on the behavior and correctness of the code. C++17 introduced changes to the order of evaluation rules, providing clearer guidelines and improving consistency across different compilers. In this article, we will explore the order of evaluation in C++17 and understand its implications.
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