Possible Duplicates: How is heap and stack memories mananged, implemented, allocated? Stack,Static and Heap in C++ In C/C++ we can store variables, functions, member functions, instances of a class either on a stack or a heap. How is each implemented? How is it managed (high level)? Does gcc preallocates a chunk of memory to...
I'm trying to compile a c programming package (thc-ipv6-0.7) on Linux Redhat 2.6.9-42.ELsmp and it's complaining that it can't find "linux/string.h". From google, I learned that this is part of the "kernel-headers" package. If I do "rpm -qa | grep kernel" It shows that "kernel-devel" is installed (which I think I need), but not "ker...
I found two ways of passing command-line arguments into a character array: int main (int argc, char **argv) { const char *s1 = argv[0]; char s2[256]; strcpy(s2, argv[0]); printf("s1: %s\ns2: %s\n\n", s1, s2); } Compiled with the IBM xlc compiler on an AIX system Returns [MyPrompt]> ./a.out s1: ./a.out s2: ./a.o...
I am using the function gets() in my C code. My code is working fine but I am getting a warning message (.text+0xe6): warning: the `gets' function is dangerous and should not be used. I want this warning message not to pop up.Is there any way? I am wondering that there might be such possibilities by creating a header file for disabli...
What are some good projects to work on in an effort to learn (or relearn) C? Ideally something akin to the assignments one might get in a class at university. Links to actual assignments/project specifications that are available online would ideal. Note: they don't have to be assignments specifically from a C class or anything like that...
Hello, I am looking for a wildcard string match API (not regex match). I cannot use anything other than Win32 APIs. ...
Take the following C code (K&R pg. 77) : push(pop() - pop()); /* WRONG */ The book says that since - and / are not commutative operators, the order in which the 2 pop functions are evaluated is necessary (obviously, to get the correct result)...and thus you have to put the result of the first function in a variable first and then pro...
Okay, here's my problem: I've got a loop running that increments the value of a variable each iteration, and I want to be able to hit a key on the keyboard to stop the loop and report the final value of the variable. Thing is, I can't figure out how to do this in C. I feel stupid because it seems like I'm overlooking some really simple a...
Hi friends, i want to get the column data type of mysql table. Though MYSQLFIELD structure but it was enumerated field types. then i tried with "mysql_real_query() " for me the error which i am getting is "query was empty" pls help to get the column data type thanks in advance krishna ...
I've read this about structure padding in C: http://bytes.com/topic/c/answers/543879-what-structure-padding and wrote this code after the article, what should print out size of 'struct pad' like 16 byte and the size of 'struct pad2' should be 12. -as I think. I compiled this code with gcc, with different levels of optimization, even the ...
Is there a C library version of the C++ std::map in a standard library? ...
Hi, I'm attempting to time code using RDTSC (no other profiling software I've tried is able to time to the resolution I need) on Ubuntu 8.10. However, I keep getting outliers from task switches and interrupts firing, which are causing my statistics to be invalid. Considering my program runs in a matter of milliseconds, is it possible t...
Hello, I want to take an interest in writing my own simple emulator for the z80 processor. I have no experience with this type of programming. I am mostly fine with using c-based languages as they are the ones I know best. If anyone could please tell me what I need to accomplish this and give me some good tutorials/references that could ...
Being a C novice I would like to hear what Macro "define"s developers are using. I've been thinking about putting these in a header to skip verbosity I've become used to: #define TS_ typedef struct { #define _TS(x) } x; #define I(x)_ { int i; for ( i = 1; i <= x; i++ ) { #define _I } } Can I add \n \t etc within these macros? ...
I am currently learning and experimenting with C and am using Bloodshed's DEV-C++ as an IDE. Now, I just realized that the following piece of code (as it is...no includes or nothing) compiles and runs : main () { printf("%d", strlen("hello")); } Now, if I'm not mistaken, shouldn't two header files be included in this source fo...
Hello everyone, I am making an 8051 microcontroller communicate wirelessly with a computer. The microcontroller will send a string to its serial port (DB9) and the computer will receive this string and manipulate it. My problem is that I do not know how to make the 8051 transmit the string just once. Since I need to manipulate the st...
Can anyone please explain this? struct node { int data; struct node * link; } main() { struct node *p, *list, *temp; list = p = temp = NULL; ......................... ......................... } addbeg() { int x; temp=malloc(sizeof(struct node)); scanf("%d", &x); temp->data=x; t...
Hi, This is potentially a newbie question, but if i open and write some data to a socket, then exit the subroutine so the socket goes out of scope, and then try and read the data from another program, at a later time, will the data still be there or does it die when the original declarations go out of scope ? Thanks, N. Further info...
How would I achieve a persistent database connection in C? Please help me. ...
As you may know C/C++ does not specified expression evaluation order. What are the reasons to left them undefined. ...