Introduction
If you are having trouble getting your C++ code to compile, you have come to the right place. In this article, we will discuss some of the common causes of compilation errors and how to fix them. We will also provide some tips and tricks to help you debug your code and get it running. By the end of this article, you should have a better understanding of why your code is not compiling and how to fix it.
Solution
#include
int main()
{
int x = 5;
int y = 10;
int z = x + y;
std::cout << z;
return 0;
}
//This code is valid and will compile.
The keyword constexpr was introduced in C++11 and improved in C++14. It means constant expression. Like const, it can be applied to variables so that a compiler error will be raised if any code attempts to modify the value. Unlike const, constexpr can also be applied to functions and class constructors. constexpr indicates that the value, or return value, is constant and, if possible, will be computed at compile time. A constexpr integral value can be used wherever a const integer is required, such as in template arguments and array declarations. And when a value can be computed at compile time instead of run time, it can help your program can run faster and use less memory. check this
The constexpr is not supported in vs2010, but it’s supported on vs2015, check this to know what’s supported on vs, actually vs2010 is not fully support of C++11, so you may update your compiler here.
So you may use vs2015 or you may not use the constexpr here, and you may check this link to see what’s the difference between the const and constexpr, so if possible to use const instead of constexpr is possible for you.
The mainly difference between them as in the previous link is:
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const applies for variables, and prevents them from being modified in your code.
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constexpr tells the compiler that this expression results in a compile time constant value, so it can be used in places like array lengths, assigning to const variables, etc.
solved This code is not compiling c++
If your C++ code is not compiling, there are a few steps you can take to try and solve the issue.
1. Check for Syntax Errors: The first step is to check for any syntax errors in your code. Syntax errors are mistakes in the code that prevent it from compiling. Common syntax errors include missing semicolons, incorrect variable types, and incorrect function calls.
2. Check for Compiler Errors: If your code is free of syntax errors, the next step is to check for any compiler errors. Compiler errors are errors that occur when the compiler is unable to understand the code. Common compiler errors include missing header files, incorrect library paths, and incorrect compiler flags.
3. Check for Linker Errors: If your code is free of syntax and compiler errors, the next step is to check for any linker errors. Linker errors occur when the linker is unable to find the necessary libraries or object files. Common linker errors include missing libraries, incorrect library paths, and incorrect linker flags.
4. Check for Runtime Errors: If your code is free of syntax, compiler, and linker errors, the next step is to check for any runtime errors. Runtime errors occur when the code is executed and something unexpected happens. Common runtime errors include memory leaks, segmentation faults, and incorrect input/output.
By following these steps, you should be able to identify and solve any issues that are preventing your C++ code from compiling. If you are still having trouble, you may want to consult a more experienced programmer or search online for solutions.