C / C++ Forum

Hi, I have a program and I want to test its execution time. When I run the program, I can feel it runs about 4 mins, but the gprof only says the accumlated time is 7.2 secs. Then I use the command: "date; my program; date" and from the time difference, I got the time 287 seconds? I am really confused about these two numbers. Why gprof...

Hello, i want to know to have multiple clients connects to same server program does following is correct code #include <sys/types.h> #include <sys/socket.h> #include <stdio.h> #include <netinet/in.h> #include <signal.h> #include <unistd.h>

when a 'const int ' is declared, where is it been created(in RAM?) #include<stdio.h> int main() { const int i=10; const int *p; p=&i; *p=12; printf("\n %d %d",i,*p);

Hi, I am looking for a utility that reads hexadecimal numbers from a file into a string. The numbers in the file are seperated by "," as delimeter. Is there a standard C utility that can do that? I am trying to read the hexadecimal numbers and trying to write this to a buffer in binary format. To do so, I am reading the numbers in a string...

Hi, I'm trying to debug an app someone else wrote called eMixer. Here's the log contents: cc -O3 -funroll-loops -c -o main.o main.c cc -O3 -funroll-loops -c -o nctgui.o nctgui.c cc -O3 -funroll-loops -c -o mixer.o mixer.c mixer.c: In function `open_soundcard_alsa':

I'm trying to construct a PAC-agent architecture for an application that has an MDI GUI. I'm structuring the mainWindow as the presentation of the top-level agent. Sub-agents of the top-level are "document editors". The top-level mainWindow contains menus for top level functions, as well as menu items for the active sub-agent (document...

Hi everyone. I am not sure of where best to post this message. I have spent 2 days now trying to answer this question to no avail, and I am gradually reaching the end of my tether. I am trying to figure out how to: see if a directory exists (using the whole path, not a folder in the current directory). if not, make the director( y | ies )

Expected output of program: Key is: 0 String is: Hello Key is: 1 String is: Goodbye Key is: 2 String is: The end Actual output: Key is: 0 String is: The End Key is: 1 String is: Key is: 2 String is:

Is #define STREQL(x,y) ((*x == *y)&&(strcmp((x),(y))==0)) is bettern than STREQL(x,y) (strcmp((x),(y))==0).why?

I've been wondering sometimes: Anyone know why Duff's device is usually written like this: void duff(const char *str, int len) { int n = (len + 7) / 8; switch (len % 8) { case 0: do{ foo(*str++); case 7: foo(*str++); case 6: foo(*str++); ...

Hello Group, Thank you in advance to the group for all responses and help. I'm looking for a 1-way hash for storing passwords on an older embedded system that would be computationally stressed using SHA1. Does anyone have any suggestions? Thanks again, Chip Auger

I am a newbie to C, and was hoping to get a little bit better handle on this until I get deeper into pointers, etc. I kind of understand it some, but still unfamiliar because I haven't got to pointers and using them yet. Here is my program: #include <stdio.h> int main() { char yourname; int yourworth;

What is the proper way of assigning null pointers in runtime. If I do the following: struct list *s=malloc(sizeof(list)); free(s); s=NULL; the program will work but Valgrind will give a complaint "Invalid write of size 4". Cheers, Antti

Hello, I am trying to teach myself C++ while babysitting a stable network in Iraq and have put together a program to display the fibonacci sequence. It works with long and long double(output in exponent though) After sequence 47 using long type the program won't display the output properly (I am assuming because of size limit of type) so I...

I tried checking internet status of my system by issuing ping to some well known server like google.com. But, the problem is that ping is not working if target address is not within the same network. I actually started writing small application, which can tell the internet status of the given system by using some standard network Apis. It...

The following code is for list operation. But I can not understand. Could anyone explain the code for me? /* * List definitions. */ #define LIST_HEAD(name, type) struct name { type *lh_first; /* first element */

Hi, I have a Problem with the following Code: //IDL typedef sequence<float> FloatSeq; struct MyStruct { FloatSeq fs; };

Hi all, I am trying to make a sinusoidal curve fit by using Levenberg-Marquardt Method with numerical recipies. I have model the my function which is y=Ao+C1.cos(x+phase) as at the end of this message. From that point on I am confused about what to do. I know I need to use mrqcof function but could not figure it out how to use use it...

aclass A, B; Can A access B's privates all the time, or only in a copy constructor? -------and--------- This code: #include <iostream> class A

using Borland Compiler. x = "this is a string" strcat(x,x) strcat(x,x) will produce "this is a stringthis is a stringthis is a stringthis is a stringt"

Sometimes I code like this: char *p = strchr(buf,'\n'); if (p) *p = 0; But I've also seen the shorter expression: buf = 0;

Hi, everyone, Suppose the following simple program: #include "engine.h" int main() { Engine *ep;

Hi: all: is some mem cat function with is like "strcat" ? Thanks

Can negating a non-negative signed integer value ever overflow? Put another way, can it be true that (mathematically) INT_MIN > -INT_MAX, LONG_MIN > -LONG_MAX etc? I know that typically it can't overflow, but if that isn't guaranteed, how can I portably detect if it would? Alex

Hi, Just a small problem (about taken the previous unsigned value in a 1D- array and copying it to the current value). Suppose there's an outer loop over the line shown below, so unsigned_int_ptr keeps changing, as it is a parameter in the function called function( &array ).... void function( unsigned *unsigned_int_ptr)