there is an error when i use signal() in c++
 

my program is like this:
#include<iostream>
using namespace std;

#include<signal.h>

static void SigWinch(int errno)
{
cout<<"aaa"<<endl;
}

int main()
{
signal(SIGWINCH , SigWinch);
exit(0);
}

when i compile it with g++,there is an error as follow:
[zd@zd test]$ g++ -ggdb3 -o 17 17.cpp
17.cpp: In function `int main()':
17.cpp:13: invalid conversion from `void (*)(int*(*)())' to `void (*)(int)'

but the signal() is void (*signal (int signo , void (*func)(int)))(int)
why it want void (*)(int*(*)())

"errno" is a static variable in libc!
You can't use "errno" as an identifier for your own variables.
Just change "errno" into (almost) anything else, and your prog should be OK.

thank you!

but i still have a program.
i write an edit with c++,and want to use signal().
the part of my program is like this:
#include "All.h"
#include "Control.h"
#include "StrView.h"

StrView FirstView;

struct winsize GetWinSize()
{
struct winsize size;
if(ioctl(1 , TIOCGWINSZ , (char *)&size) < 0)
{
size.ws_col=0;
size.ws_row=0;
FirstView.DisplayCommand("TIOCGWINSZ error");
}
return size;
}

void SigWinch(int signo)
{
FirstView.WinSize=GetWinSize();
FirstView.Display(*(FirstView.str));
}

void SigAlrm(int signo)
{
}

int main (int argc , char *argv[])
{
try
{
if(argc == 1)
argv=NULL;
Control control(argv , argc);
signal(SIGWINCH , SigWinch);
signal(SIGALRM , SigAlrm);
move(0 , 0);
for(;!control.GetNowExit()
{
if(control.GetMode() == COMMANDMODE)
control.ReadCommand();
else
control.EditFile();
}
}
catch(FatalError error)
{
cout<<error.GetStr();
}
}

but when i change the size of window,the function SigWinch() is not executed.

This should off course be:
"errno" is a global variable in libc

i know.
so i changed the name of parameter
but there is still problem.
i have posted the program.
i don't know why SigWinch() wasn't execute

- Does the first program execute SigWinch() when you resize terminal?
- Is the second program a text-mode (console / xterm) program, or is it a graphical (X) program?

the second program is a text-mode program.
and the first program does execute SigWinch() when the terminal is resized