Multiple definitions of “main” suggests that you have another definition of main. Perhaps in another .c or .cpp file in your project. You can only have one function with the same name and signature (parameter types). Also, main is very special so you can only have one main function that can be used as the entry point (has either no parameters, one int, or an int and a char**) in your project.
P.S. Technically this is a linker error. It’s a subtle difference, but basically it’s complaining that the linker can’t determine which function should be the entry point, because there’s more than one definition with the same name.
Related Posts:
- What is a segmentation fault?
- Floating point exception( core dump
- Passing Arrays to Function in C++
- Return array in a function
- Regular cast vs. static_cast vs. dynamic_cast
- What is an unsigned char?
- C++ std::priority_queue uses the lambda expression
- When to use reinterpret_cast?
- Expression must be a modifiable lvalue
- How to read a file line by line or a whole text file at once?
- Split a string using C++11
- Single class has a Class Redefinition Error
- Identifier not found error on function call
- Debug assertion failed. C++ vector subscript out of range
- What causes a SIGABRT fault?
- Graphics Library for C++
- ‘cout’ was not declared in this scope
- What is the difference between const int*, const int * const, and int const *?
- TranslateName() function doesn’t work on win10
- How to use the PI constant in C++
- How to concatenate two strings in C++?
- How to get current time and date in C++?
- where is the official c++ documentation
- warning: ISO C++ forbids variable length array
- cin >> “no operator matches these operands”
- C++ Structure Initialization
- expression preceding parentheses of apparent call must have (pointer-to-) function type
- Enum to String C++
- Random float number generation
- C++ terminate called without an active exception
- MinGW: “gcc is not recognized as an internal or external command”
- Convert Python program to C/C++ code?
- How to debug ‘Stack smashing detected’?
- basic_string::_M_construct null not valid after constructing subvector of strings
- Does C++ have a Garbage Collector?
- Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
- C++ #include guards
- glm rotate usage in Opengl
- warning: control reaches end of non-void function [-Wreturn-type]
- Program received signal SIGSEGV, Segmentation fault
- gcc/g++: “No such file or directory”
- Error: expected type-specifier before ‘ClassName’
- General way of solving Error: Stack around the variable ‘x’ was corrupted
- error MSB3073: How do I fix this?
- timestamp of time(0) at multiple places in a C++ program
- error: member access into incomplete type : forward declaration of
- Debug assertion failed
- “Implicit instantiation of undefined template” when forward declaring template class
- “…redeclared as different kind of symbol”?
- Error “system” is ambiguous?
- What does “Permission denied” “Id returned 1 exit status” mean?
- When does an Incomplete Type error occur in C++
- std::cin input with spaces?
- extended initializer lists only available with
- how to initialize an empty integer array in c++
- What does |= mean in c++
- Error: cannot declare variable ‘c’ to be of abstract type ‘circle’
- Is there a standard C++ grammar?
- invalid use of non-static data member
- C: using strtol endptr is never NULL, cannot check if value is integer only?
- use of class template requires template argument list
- Why would this give a Use of uninitialised value of size 8
- C++ Error: Type Name is Not Allowed
- Is Python faster and lighter than C++?
- Case insensitive string comparison C++
- C++ Exception thrown: read access violation. this was nullptr
- C++ getInt() function (have a java equivalent attached)
- Simple string parsing with C++
- member access within null pointer of type ‘struct ListNode’
- How does c++ represent negative value
- Python for C++ Developers
- Remove last character from C++ string
- plotting package for c++
- Passing as const and by reference – Worth it?
- Understanding Recursion to generate permutations
- In C++ what does template<> mean?
- Incrementing in C++ – When to use x++ or ++x?
- Use of undefined type [duplicate]
- Warning : overflow in implicit constant conversion
- C++ multiline string literal
- How to use stringstream to separate comma separated strings [duplicate]
- When/why to make function private in class?
- Using cin to input a single letter into a char
- C++ calling base class constructors
- Why am I getting an ‘Else without previous if’ error within a for loop?
- Dynamic and static Scoping program differences
- How to fix the error “Windows SDK version 8.1” was not found?
- Is C++ Array passed by reference or by pointer?
- Compiling C++11 with g++
- set head to NULL (‘NULL’ : undeclared identifier)
- ERROR C2039: ‘vector’: is not a member of ‘std’
- Finding square root without using sqrt function?
- What does “warning: not all control paths return a value” mean? (C++)
- Array of Linked Lists C++
- Is it still safe to delete nullptr in c++0x?
- Declaration is incompatible with type
- One or more multiply defined symbols found
- I’m getting the error “stoi is not a member of std” in myprogramminglab [duplicate]
- Template constructor in a class template – how to explicitly specify template argument for the 2nd parameter?
- C++ float array initialization