I'm getting started with lua. I have a very simple project but I can't get it to run. I keep getting the same error: fatal error LNK1107: file broken or damaged: cannot read at 0x2C3C file: lua.h line:1
help would be greatly appreciated
thanks in advance
c++ code
#include <iostream>
extern "C"
{
#include "lua.h"
#include "lualib.h"
#include "lauxlib.h"
#include "luaconf.h"
}
int main()
{
int s=0;
lua_State *L = lua_open();
// load the libs
luaL_openlibs(L);
//run a Lua scrip here
luaL_dofile(L,"foo.lua");
printf("\nI am done with Lua in C++.\n");
lua_close(L);
return 0;
}
lua code
io.write("Please enter your name: ")
name = io.read() -- read input from user
print ("Hi " .. name .. ", enjoy hacking with Lua");
It seems you're trying to link a header file into your program.
Related
I'm using perror:
perror("Error message:");
When the above is used it displays the message passed to the string followed by the actual error that occurred. This is a standard function, however I want to log this to a file, how to I get the actual error that goes with this so I can log it?
You can use the code below:
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
int main() {
FILE* filePtr;
filePtr = fopen (logFilePath, "a");
//...
//some code
//...
if(critical_part){
fprintf(filePtr, "errno :%s Error in critical part - line 123\n",strerror(errno));
}
}
I use chdir() to switch the directory, and then use execvp() to execute "java Main". I'm sure there is Main.class, but something went wrong. I want to know why.
#include <cstdio>
#include <unistd.h>
using namespace std;
int main(){
char buf[80];
getcwd(buf,sizeof(buf));
printf("current working directory: %s\n", buf);
chdir("/home/keane/Judge/temp");
getcwd(buf,sizeof(buf));
printf("current working directory: %s\n", buf);
char *array[3];
array[0] = "java";
array[1] = "Main";
array[2] = NULL;
execvp("java", array);
return 0;
}
the error is could not find the main class , and I can run java Main in that directory.
What drives me crazy is that I can't use system("java Main"), and the error is that Error: Could not find or load main class Main, and it's just like this on my computer
update:
#include <unistd.h>
#include <cstdlib>
int main(){
chdir("/home/keane/Judge/temp");
system("pwd");
system("ls");
system("java Main");
return 0;
}
the output on console is:
/home/keane/Judge/temp
1.out 3.out 5.out Main.class stdout_spj.txt
2.out 4.out ce.txt Main.java
Error: Could not find or load the main class Main
my final solution is to reboot the computer and add -cp . to the java command.
althought I don't why is necessary.
thanks everyone!
This works as intended on my system, maybe you need to add -cp . to your java call.
EDIT: to elaborate: -cp (for classpath) tells java where to look for user provided .class files. This does not necessarily include the current working directory by default.
The execution of execvp() is non-blocking and takes ownership of the caller, that means that when it starts if the program ends too quickly you will never be able to see the result, to solve this I use fork(). The wait is just to avoid using sleep as I used at the begining. Its all in c.
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/wait.h>
int main(int argc, char** argv){
char buf[80];
getcwd(buf,sizeof(buf));
printf("current working directory: %s\n", buf);
chdir("/home/");
getcwd(buf,sizeof(buf));
printf("current working directory: %s\n", buf);
char *array[3] = {"java", "Main", NULL};
if(fork() == 0) {
if(execvp("java", array) < 0) {
fprintf(stderr, "Error spawning command: %s\n", strerror(errno));
}
} else {
printf("Command spawned\n");
wait(NULL); // Wait to the forked process to end (avoid using sleep)
}
return 0;
}
I am making a game that can be played on mac and windows with cocos2d-x.
I first wrote the code in mac's Xcode, and it worked on mac.
When I took the project to windows and tried to build it in Visual Studio 2017, an error occurred.
Error C1083 Cannot open include file: 'cxxabi.h': No such file or directory Narazumono c:\users\masanori\desktop\narazumono3.17\classes_win\nrzcoding.cpp 10
I use cxxabi.h to get the class name of the object.
#include "NRZCoding.h"
#include <cxxabi.h>
#include <cstdio>
#include <algorithm>
#include "NRZUtils.h"
using namespace std;
USING_NS_CC;
namespace NRZCoding {
...
const string& EncodableObject::getClassName()
{
if (_className.size() > 0) {
return _className;
}
const type_info& id = typeid(*this);
int stat;
char *name = abi::__cxa_demangle(id.name(),0,0,&stat);
CCASSERT(name != NULL && stat == 0, "failed to demangle");
_className = string(name);
free(name);
return _className;
}
...
What do I need to do?
I am using cocos2d-x 3.17.1 and Visual Studio 2017.
Thank you.
I'm working through Problems with reentrant Flex and Bison. It compiles and runs just fine on my machine. What I want to do though is make use of C++ STL. Anytime I try to include a CPP header, it says it can't be found. There are only a handful of questions about this on Goog. Does anyone have a working example of this sort of setup, or a solution I might implement?
Any help would be greatly appreciated.
Thanks!
EDIT So for one reason or another, I have to add the include path of any headers in the build settings. Must be due to the custom makefile of this person's example. It's above my pay-grade. Anyway, I can now use STL libraries inside of main.
WHAT I REALLY WANT TO DO IS USE FLEX/BISON WITH CPP, AND IF I TRY TO INCLUDE STL HEADERS ANYWHERE BUT MAIN, I GET ERROR "HEADER NOT FOUND".
I can include C-headers just fine, though.
Here's answer from the author of another answer in the linked topic.
I have adapted that my example to work with C++.
The key points are:
I am using recent Flex / Bison: brew install flex and brew install bison. Not sure if the same will work with default OSX/Xcode's flex/bison.
Generated flex/bison files should have C++ extensions (lexer.[hpp|mm], parser.[hpp|mm]) for Xcode to pick up the C++ code.
There is a Xcode's Build Phase that runs Make.
All the relevant files follow below but I recommend you to check out the example project.
main.mm's code is
#include "parser.hpp"
#include "lexer.hpp"
extern YY_BUFFER_STATE yy_scan_string(const char * str);
extern void yy_delete_buffer(YY_BUFFER_STATE buffer);
ParserConsumer *parserConsumer = [ParserConsumer new];
char input[] = "RAINBOW UNICORN 1234 UNICORN";
YY_BUFFER_STATE state = yy_scan_string(input);
yyparse(parserConsumer);
yy_delete_buffer(state);
Lexer.lm:
%{
#include "ParserConsumer.h"
#include "parser.hpp"
#include <iostream>
#include <cstdio>
int yylex(void);
void yyerror(id <ParserConsumer> consumer, const char *msg);
%}
%option header-file = "./Parser/Generated Code/lexer.hpp"
%option outfile = "./Parser/Generated Code/lexer.mm"
%option noyywrap
NUMBER [0-9]+
STRING [A-Z]+
SPACE \x20
%%
{NUMBER} {
yylval.numericValue = (int)strtoul(yytext, NULL, 10);
std::cout << "Lexer says: Hello from C++\n";
printf("[Lexer, number] %s\n", yytext);
return Token_Number;
}
{STRING} {
yylval.stringValue = strdup(yytext);
printf("[Lexer, string] %s\n", yytext);
return Token_String;
}
{SPACE} {
// Do nothing
}
<<EOF>> {
printf("<<EOF>>\n");
return 0;
}
%%
void yyerror (id <ParserConsumer> consumer, const char *msg) {
printf("%s\n", msg);
abort();
}
Parser.ym:
%{
#include <iostream>
#include <cstdio>
#include "ParserConsumer.h"
#include "parser.hpp"
#include "lexer.hpp"
int yylex();
void yyerror(id <ParserConsumer> consumer, const char *msg);
%}
%output "Parser/Generated Code/parser.mm"
%defines "Parser/Generated Code/parser.hpp"
//%define api.pure full
%define parse.error verbose
%parse-param { id <ParserConsumer> consumer }
%union {
char *stringValue;
int numericValue;
}
%token <stringValue> Token_String
%token <numericValue> Token_Number
%%
/* http://www.tldp.org/HOWTO/Lex-YACC-HOWTO-6.html 6.2 Recursion: 'right is wrong' */
tokens: /* empty */
| tokens token
token:
Token_String {
std::cout << "Parser says: Hello from C++\n";
printf("[Parser, string] %s\n", $1);
[consumer parserDidParseString:$1];
free($1);
}
| Token_Number {
printf("[Parser, number]\n");
[consumer parserDidParseNumber:$1];
}
%%
Makefile:
generate-parser: clean flex bison
clean:
rm -rf './Parser/Generated Code'
mkdir -p './Parser/Generated Code'
flex:
# brew install flex
/usr/local/bin/flex ./Parser/Lexer.lm
bison:
# brew install bison
/usr/local/bin/bison -d ./Parser/Parser.ym
I created a VCL Application in c++, borland. In my project there is a file where I have implemented embedded python in the methods defined in the same(my application contains a button which calls the method in which embedded python is implemented). when I compile, my build is successful. but when I run my application, and click on the button it shows the run time error : "Access violation at address 1E091375 in module 'PYTHON25.DLL'. Read of address 00000004" . please help.
I have never used Python before.
my program:
#pragma hdrstop
#include <fstream>
#include <iostream>
#include <iomanip>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "Python.h"
#include "Unit1.h"
#include "Unit2.h"
#pragma link "python25_bcpp.lib"
//---------------------------------------------------------------------------
#pragma package(smart_init)
bool callHelloWorld(int intVal)
{
char fName[] = "Hello"; //file name
char cFunc[] = "hello"; //method name
char *pfName, *pcFunc;
PyObject *pName, *pModule, *pDict, *pFunc ;
pfName = fName;
pcFunc = cFunc;
Py_Initialize();
pName = PyString_FromString(pfName);
pModule = PyImport_Import(pName);
pDict = PyModule_GetDict(pModule);
pFunc = PyDict_GetItemString(pDict, pcFunc);
if (PyCallable_Check(pFunc))
{
PyObject_CallObject(pFunc, NULL);
} else
{
PyErr_Print();
}
// Py_DECREF(pModule);
// Py_DECREF(pName);
Py_Finalize();
return 0;
}
Check the return values of PyImport_Import (is the module in the search path?) and PyDict_GetItemString.
If that doesn't help put some trace messages in your app to see where it crashes.
This works for me:
Just delete Py_Finalize()
I read in another site that Py_Finalize has some problems in specific cases such as threading.