redefinition

new to C , error C2371: 'error" : redefinition; diffrent basic types

由 落爺英雄遲暮 提交于 2019-12-11 04:02:40
问题 i've to submit this assigment in few hours and i'm very nervous, it's sort of Gas Station managing programs, handeling input files, and printing results... it's only 1 .c file and that's my first code lines, which defines the structs #include <stdio.h> #include <string.h> #include <stdlib.h> struct Gas_Station *pgasStationHead = NULL; typedef struct Gas_Station { char *name; double octan95SS; double octan95FS; double octan98SS; double octan98FS; double gasSoldTotal; double gasSoldSS; double

Why “Redefinition of typedef” error with GCC 4.3 but not GCC 4.6?

由 风格不统一 提交于 2019-12-10 14:18:32
问题 I've been developing my application using GCC 4.6 for compilation but a user reported the "redefinition of typedef" error. After some confusion where I wrongfully told the user to fetch the latest source using Git, I took a closer look and found something similar to this: /* mystruct.h */ #ifdef MYSTRUCT_H #define MYSTRUCT_H typedef struct _mystruct mystruct #endif /* mystruct.c */ #include "mystruct.h" typedef struct _mystruct { int a; int b; } mystruct; Which is quite easy to fix for the

Why Javascript doesn't let a function redefine itself from within itself?

由 独自空忆成欢 提交于 2019-12-10 13:50:20
问题 Consider the code: window.a = function(x){ var r = x*2; window.a =alert; // redefines itself after first call return r; }; a('2 * 2 = '+a(2)); // doesn't work. it should've alerted "2 * 2 = 4" This doesn't work either: window.a = function(x){ alert(x); window.a = function(x){ // redefines itself after first call var r = x*2; return r; } }; a('2 * 2 = '+a(2)); // doesn't work. it should've alerted "2 * 2 = 4" As neither does this: window.a = function(x){ alert(x); window.c = window.a; window.a

variable redefinition, embedded c

由 99封情书 提交于 2019-12-10 10:45:00
问题 I'm working on an embedded c project and am having issues with global variable redefinition. I've split up the function declarations and definitions into a handful of .h and .c files. Many of these functions need access to global variables, which are defined in global_vars.h. Therefore, at the beginning of the header files, inside the #ifndef, #define section, "global_vars.h". If I don't, as you might imagine I get a bunch of undefined variable errors. However, even though global_vars.h has

LNK2005: " already defined error

由 点点圈 提交于 2019-12-10 10:28:39
问题 I am trying to use a global variable from separated .cpp files. I have got an init.h file as: //init.h #ifndef init #define init int a = 3; #endif I have got an init.cpp file as: //init.cpp #include init.h Then finally my main.cpp file is: //main.cpp #include "init.h" int main(void) { while(1) { } } After this, I get the error: 1>init.obj : error LNK2005: "int a" (?a@@3HA) already defined in main.obj 1> ..deneme.exe : fatal error LNK1169: one or more multiply defined symbols found Why my

Compiling MySQL Connector with Visual Studio 2015 Win64

由 痴心易碎 提交于 2019-12-08 05:38:33
问题 After creating a solution with cmake, I am being put face to face with 1400 errors in Visual Studio during build. The main problem is, it seems no one compiles the connector, and just uses the precompiled library for their projects, more so on Windows. Here are some of errors, it seems timespec is being redefined one more time, first of all in ,and then a second time in my_global.h, errors and definitons below. So the question is, how the hell do I fix 1400 errors? Or at least, some advice

Multiple redefinition error

由 孤街浪徒 提交于 2019-12-07 22:28:09
问题 After learning more about classes and pointers, I refactored a program I had and wiped out > 200 lines of code, in the process creating two other classes, Location and Piece . The problem is, after getting everything to compile, the linker complains that the constructor for Piece is defined multiple times, with a load of errors: In function 'Piece': board.o multiple definition of 'Piece::Piece(int)` char_traits.h In function 'Piece': board.o multiple definition of 'Piece::Piece(int)` piece

Winsock redefinition errors [duplicate]

由 不羁的心 提交于 2019-12-06 19:56:57
问题 This question already has answers here : C++ Redefinition Header Files (winsock2.h) (16 answers) Closed 3 years ago . I am compiling a project in Visual C++ 2010, but I have problems with some Winsock redefinitions. First of all I get: syntax error : identifier 'SOCKADDR_STORAGE' But if I include winsock or winsock2 or ws2tcpip i get many errors like these: error C2011: 'sockaddr' : 'struct' type redefinition error C2011: 'WSAData' : 'struct' type redefinition error C2011: 'linger' : 'struct'

variable redefinition, embedded c

由 霸气de小男生 提交于 2019-12-06 13:47:57
I'm working on an embedded c project and am having issues with global variable redefinition. I've split up the function declarations and definitions into a handful of .h and .c files. Many of these functions need access to global variables, which are defined in global_vars.h. Therefore, at the beginning of the header files, inside the #ifndef, #define section, "global_vars.h". If I don't, as you might imagine I get a bunch of undefined variable errors. However, even though global_vars.h has the #ifndef _GLOBAL_VARS_H_ #define... #endif, I get redefinition errors for all the global variables.

Multiple redefinition error

由 只愿长相守 提交于 2019-12-06 07:40:36
After learning more about classes and pointers, I refactored a program I had and wiped out > 200 lines of code, in the process creating two other classes, Location and Piece . The problem is, after getting everything to compile, the linker complains that the constructor for Piece is defined multiple times, with a load of errors: In function 'Piece': board.o multiple definition of 'Piece::Piece(int)` char_traits.h In function 'Piece': board.o multiple definition of 'Piece::Piece(int)` piece.cpp In function 'Piece': player.o multiple definition of 'Piece::Piece(int)` piece.cpp In function 'Piece
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