This is the most "minimal" legal C program. It is not obvious but main is in fact a function, not the real beginning of the compiled code. When you link a C program the linker adds (something like) two functions: _start() and _end() The actual names are implementation dependent. _start() sets up a lot of memory objects and files like stdout and stdin _end() cleans up after _start()
If main is not fully declared you get undefined behavior. Undefined behavior is just that - the program may dump core, panic the kernel, format your disk, or send family pictures to the Mars explorer.
This User Gave Thanks to jim mcnamara For This Post:
i just finished a project for a c++ class that i wrote at home on my computer, compiled with gcc. when i brought the code into school it would not compile, it would complain that cannot call main() function. at school we use ancient borland c++ from 1995. anyway my program has 20 different... (3 Replies)
Hi,
I have a main loop which calls a sub loop, which finally returns to the main loop itself. The main loop runs when a flag is set. Now, I have a signal handler for SIGINT, which resets the flag and thus stops the main loop. Suppose I send SIGINT while the program is in subloop, I get an error... (1 Reply)
Hi! I've a C program as shown below..
The line numbers and the statements of the program are separated by a space..
1 #include<stdio.h>
2 char a,b,c;
3 float x,y,z;
4 int main()
5 {
6 int d,e,f;
7 // further declarations
8 // further declarations
9 /* body*/
10 }
11 void fun1()
12... (1 Reply)
why does this not work?
#include <stdio.h>
#include <stdlib.h>
char getFileMode(char charChanger) {
char filetype; /*var to hold the value to be returned*/
filetype = charSetter; /*set filetype to "l" if it is a symlink*/
return filetype;
}
int main(void){
char... (8 Replies)
Hi friends,
when I am passing arguments to main, I want another function to be able to have access to that function, the problem is that I am creating athread, which has a function like void *xyz(void *), how can pass the refernce of argv to this function, if you see my program, you will better... (2 Replies)
H friends,
As we know, a function returns a value and that value is saved somwhere. like
int Sum( int x, int y )
{
return x + y;
}
Total = Sum( 10, 20 );
The value 30 is saved in variable Total.
Now the question is, what int value does the function main return, and where is it... (5 Replies)
Hello All,
I am trying to call a function from the calling main program from a dlopened library function, below is the entire code, when I execute it it crashes with sigill. Can you guys help me out I guess I am missing out on the linker flag or something here. besides I am new to AIX and... (1 Reply)
I feel that i am missing something obvious but i can't find what is wrong.
I have a script that is launching some functions with "&" and each call is feeding the array with a value. When all calls are finished I just want to retrieve the values of that array.
It is looking like that :
... (5 Replies)
Hi. I have some code, that for some reason, I could not post it here in this post. Here's the address for it:
#if 0 shc Version 4.0.1, Generic Shell Script Compiler GNU GPL Version 3 Md - Pastebin.com
First off, I used "shc" to convert the code from shell script to C.
And The... (6 Replies)
Discussion started by: ignatius
6 Replies
LEARN ABOUT ULTRIX
dwtscrollwindowsetareas
DwtScrollWindowSetAreas(3Dwt)DwtScrollWindowSetAreas(3Dwt)Name
DwtScrollWindowSetAreas - Sets up or adds the window region, and the horizontal or vertical scroll bar widgets to the scroll window widget.
Syntax
void DwtScrollWindowSetAreas(widget, horizontal_scroll_bar, vertical_scroll_bar, work_region)
Widget widget;
Widget horizontal_scroll_bar;
Widget vertical_scroll_bar;
Widget work_region;
Arguments
widget Specifies the scroll window widget ID.
horizontal_scroll_bar
Specifies the scroll bar widget ID for the horizontal scroll bar to be associated with the scroll window widget. You can set or
specify this ID only after creating an instance of the main window widget. The attribute name associated with this argument is
DwtNhorizontalScrollBar.
vertical_scroll_bar
Specifies the scroll bar widget ID for the vertical scroll bar to be associated with the scroll window widget. You can set or
specify this ID only after creating an instance of the main window widget. The attribute name associated with this argument is
DwtNverticalScrollBar.
work_region
Specifies the widget ID for the window to be associated with the scroll window work area. You can set or specify this ID only
after you create an instance of the main window widget.
Description
The DwtScrollWindowSetAreas function adds or changes a window work region and a horizontal or vertical scroll bar widget to the scroll win-
dow widget for the application. You must call this function before the scroll window widget is realized, that is, before calling the X
intrinsics function XtRealizeWidget. Each widget is optional and may be passed as NULL.
See AlsoDwtScrollWindow(3Dwt), DwtWindow(3Dwt),
Guide to the XUI Toolkit: C Language Binding
Guide to the XUI Toolkit Intrinsics: C Language Binding
DwtScrollWindowSetAreas(3Dwt)