In eclipse, whenever I create a new C++ class, or C header file, I get the following type of structure. Say I create header file example.h, I get this: /*Comments*/ #ifndef EXAMPLE_H_ #define EXAMPLE_H_ /* Place to put all of my definitions etc. */ #endif I think ifndef is saying that if EXAMPLE_H_ isn't defined, define it, which may...
Anybody knows from where I can download a Lex and Yacc program(the source code) for complete syntax checking of a C program? Pls post the link as comment ...
Hello guys, I have a weird problem in C. I have a structure and I pointed sample to that structure : test sample; now in the code, I call that structure through a function : function is called something, so something(&sample) is used to point the structure in the function. Now I need to copy values of sample to sample2 .. So I want ...
hi, i am having a dropdown box showing list of roles, i used Roles.GetAllroles() for showin' all roles in dropdown box but i don't wanna show a role named "Admin" in the dropdown box. ...
A response to a comment I made here made me stop and think: "I don't really know what the state of C99 support is." Wikipedia gives details for a few compilers, but I'm not familiar enough with C99 to know all the bits and pieces of the standard, so I'm looking for a gestalt overview answer to the question: What is the state of C99 sup...
I have a struct: typedef struct student { char fname[30]; char sname[30]; char tname[30]; Faculty fac; int course; char group[10]; int room; int bad; } Student; I read it from the file: Database * dbOpen(char *fname) { FILE *fp = fopen(fname, "rb"); List ...
Hi, I want to know about const internals in c and c++ . How compiler imposes constantness ? Can some one help me please. ...
I have a doubt. Assume R and S are 2 relations with attributes A and B respectively . If I have a query Select * From R, S Where R.A = S.B Does this work like a double For Loop in say c or c++ For( i=0; i<n; i++) For( j=0; j<n; j++) if (i == j) //DO some work ...
Hey guys, I have my code below that consits of a structure, a main, and a function. The function is supposed to display two parameters that have certain values, both of which point to the same structure. The problem I dont know how to add the SECOND parameter onto the following code : #include<stdio.h> #define first 500 #define sec 5...
Hello, I have a pretty easy question. (using C) In a sentence such as In this document, there are 345 words and 6 figures How can I scan 345 and 6 while ignoring all that is in between ? I tried fscanf(FILE *pointer,"%d %d",&words,&figs); But it only gets the first value ... What am I doing wrong ? EDIT Im sorry I forgot to ment...
In C, is it possible to use recursion within the sprintf function ? For some reason I get a segmentation fault when I do it: inline char *TreeNode_toString(const TreeNode *node) { char *out; if(TreeNode_isExternal(node)) // If the node has no children... { sprintf(out, "%s:%.2f", node->name, node->distance); } else // The...
I'm running gcov over some C code with a switch statement. I've written test cases to cover every possible path through that switch statement, but it still reports a branch in the switch statement as not taken and less than 100% on the "Taken at least once" stat. Here's some sample code to demonstrate: #include "stdio.h" void foo(int ...
Hello all, I'm trying to create a utility which exports a file's security descriptor, and re-assign it on demand. I've created a test sample, which uses GetSecurityInfo() with the DACL flag, and then try to re-assign the very same DACL with SetSecurityInfo(). Before applying SetSecurityInfo(), the descriptor's 'Control' is: 0xA004 , SE...
Hello, Can anyone briefly explain how do these two commands work ? isdigit and isalpha .. Ofcourse I read online sources before asking the question, but unfortunately I tried them and didnt get them to work. What is the simplest way ? I know it gives back a value, so im assuming I can use it like this : if(isdigit(someinput)==1) r...
I'm trying to check whether or not the second argument in my program is a substring of the first argument. The problem is that it only work if the substring starts with the same letter of the string. EDIT: It must be done in C, not C++. Sorry int main(int argc, char **argv){ if (argc != 3) { printf ("Usage: check <string o...
I'm currently using the following code to output text in green to the terminal: printf("%c[1;32mHello, world!\n", 27); However, I want more shades of green. What's the easiest way to accomplish this? ...
Hi, The following piece of code was given to us from our instructor so we could measure some algorithms performance: #include <stdio.h> #include <unistd.h> static unsigned cyc_hi = 0, cyc_lo = 0; static void access_counter(unsigned *hi, unsigned *lo) { asm("rdtsc; movl %%edx,%0; movl %%eax,%1" : "=r" (*hi), "=r" (*lo) : /...
How can I hide curl_easy_perform output (in a shell)? This is in regards to a C application. ...
Hi, I'm writing a virtual machine in C just for fun. Lame, I know, but luckily I'm on SO so hopefully no one will make fun :) I wrote a really quick'n'dirty VM that reads lines of (my own) ASM and does stuff. Right now, I only have 3 instructions: add, jmp, end. All is well and it's actually pretty cool being able to feed lines (doing i...
I'm trying to design a portable API in ANSI C89/ISO C90 to access a wireless networking device on a serial interface. The library will have multiple network layers, and various versions need to run on embedded devices as small as an 8-bit micro with 32K of code and 2K of data, on up to embedded devices with a megabyte or more of code an...