11-05-2006
You mean dynamic allocation??
Quote:
Originally Posted by axes
Thanx Perderabo
I have a requirement like this:
I need to prepare a string dynamically whose size is not known ahead of time. How can I program this?
Example:-
main() {
/* DO SOME THING */
prepare_string(string_to_be_prepared);
*******
*******
}
prepare_string(string_to_be_prepared) {
/* prepare the dynamic size string */
return;
}
Any pointers pls
I think you need to create a string at run time .And if that is the case you could use following code
int prep_string(char *);
int main()
{
char *str; // The dynamicallly allocated string u could use it like any other string
// Like str[30] ,str[i] is valid since it is charachter string
if(prep_string(str) == -1)
//code to handle not enough memory condition
// Now use the str as any other charachter string
return 0;
}
int prep_string(char *str)
{
int size ;
printf("\nEnter the size of the string ");
scanf("%d",&size);
str =(char *) malloc(size * sizeof(char));
if(str == NULL)
// Not enough memory to satisfy the request
return -1;
else
return 0;
}
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LEARN ABOUT MOJAVE
curs_instr
curs_instr(3X) curs_instr(3X)
NAME
instr, innstr, winstr, winnstr, mvinstr, mvinnstr, mvwinstr, mvwinnstr - get a string of characters from a curses window
SYNOPSIS
#include <curses.h>
int instr(char *str);
int innstr(char *str, int n);
int winstr(WINDOW *win, char *str);
int winnstr(WINDOW *win, char *str, int n);
int mvinstr(int y, int x, char *str);
int mvinnstr(int y, int x, char *str, int n);
int mvwinstr(WINDOW *win, int y, int x, char *str);
int mvwinnstr(WINDOW *win, int y, int x, char *str, int n);
DESCRIPTION
These routines return a string of characters in str, extracted starting at the current cursor position in the named window. Attributes are
stripped from the characters. The four functions with n as the last argument return a leading substring at most n characters long (exclu-
sive of the trailing NUL).
RETURN VALUE
All of the functions return ERR upon failure, or the number of characters actually read into the string.
X/Open defines no error conditions. In this implementation, if the window parameter is null or the str parameter is null, a zero is
returned.
NOTES
Note that all routines except winnstr may be macros.
PORTABILITY
SVr4 does not document whether a length limit includes or excludes the trailing NUL.
The ncurses library extends the XSI description by allowing a negative value for n. In this case, the functions return the string ending
at the right margin.
SEE ALSO
curses(3X).
curs_instr(3X)