I get this with a C99-compliant compiler:
on this code:
const char *foo means it cannot be modified (the "modifiable lvalue" complaint), for example. ujeshm may use a non-standard compiler or a really old one that allows it.
You can work around it by copying a const char into a regular string then modifying the new string.
Note: A warning means the code did not compile correctly, and if it runs you are then coding by coincidence and will sooner or later cause serious problems that are difficult to resolve.
If you are using gcc, compile
to see full errors and warnings.
hello everybody!
I want to create a file with permissions for read, write, and execute to everybody using C, so I write this code:
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int main(){
int fileDescriptor;
fileDescriptor =... (2 Replies)
Hi,
How to replace any character in a file with a newline character using sed ..
Ex:
To replace ',' with newline
Input:
abcd,efgh,ijkl,mnop
Output:
abcd
efgh
ijkl
mnop
Thnx in advance.
Regards,
Sasidhar (5 Replies)
Hello,
I'm trying to write a method which will return the extension of a file given the file's name, e.g. test.txt should return txt. I'm using C so am limited to char pointers and arrays. Here is the code as I have it:
char* getext(char *file)
{
char *extension;
int i, j;... (5 Replies)
Hi
I m having ifconfig -a o/p like
sbanlab1:ksh# ifconfig -a | egrep "flags|inet" | awk -F' ' '{print $1,$2}'
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL>
inet 127.0.0.1
lo0:1: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL>
inet 127.0.0.1
bge0:... (1 Reply)
Compiling xpp (The X Printing Panel) on SL6 (RHEL6 essentially):
xpp.cxx: In constructor ‘printFiles::printFiles(int, char**, int&)’:
xpp.cxx:200: error: invalid conversion from ‘const char*’ to ‘char*’
The same error with all c++ constructors - gcc 4.4.4.
If anyone can throw any light on... (8 Replies)
I am writing some code in C++ to print a message using fprintf
Here is an example
void pr_desc(
FILE* stream,
int shift,
const char* desc) {
const char* format="%*s\e;
fprintf(stream,format,shift,"",desc);
}
I call it using
const char* desc;
... (4 Replies)
Dear all,
I am using C and ROOT for programming. And I need to incorporate following in my code.
char *fps=NULL;
int dec=0,sign=0;
float mean = h1->GetMean(1); //0.001298
fps= fcvt(mean,6 , &dec, &sign);
I need to provide this mean as const char to some other function to get... (8 Replies)
Pointers are seeming to get the best of me and I get that error in my program.
Here is the code
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define REPORTHEADING1 " Employee Pay Hours Gross Tax Net\n"
#define REPORTHEADING2 " Name ... (1 Reply)
Discussion started by: Plum
1 Replies
LEARN ABOUT REDHAT
strncpy
STRCPY(3) Linux Programmer's Manual STRCPY(3)NAME
strcpy, strncpy - copy a string
SYNOPSIS
#include <string.h>
char *strcpy(char *dest, const char *src);
char *strncpy(char *dest, const char *src, size_t n);
DESCRIPTION
The strcpy() function copies the string pointed to by src (including the terminating ` ' character) to the array pointed to by dest. The
strings may not overlap, and the destination string dest must be large enough to receive the copy.
The strncpy() function is similar, except that not more than n bytes of src are copied. Thus, if there is no null byte among the first n
bytes of src, the result will not be null-terminated.
In the case where the length of src is less than that of n, the remainder of dest will be padded with nulls.
RETURN VALUE
The strcpy() and strncpy() functions return a pointer to the destination string dest.
BUGS
If the destination string of a strcpy() is not large enough (that is, if the programmer was stupid/lazy, and failed to check the size
before copying) then anything might happen. Overflowing fixed length strings is a favourite cracker technique.
CONFORMING TO
SVID 3, POSIX, BSD 4.3, ISO 9899
SEE ALSO bcopy(3), memccpy(3), memcpy(3), memmove(3)GNU 1993-04-11 STRCPY(3)