C / C++ Forum

The following question stems from the following thread on comp.lang.c: http://groups.google.com/group/comp.lang.c/browse_thread/thread/0ad03c96df57381a/5f20260b30952fe7?hl=en#5f20260b30952fe7 I was sort of mystified by a comment made by Eric. And I quote: "You might also be confused by the fact that each `struct my_struct' contains a...

I have spent hours on this problem and cannot get it, any help would be appreciated: A binary search tree using n distinct integers 1, 2, ..., n. There are n! possible initial orderings of the n numbers. How many of the n! permutations will result in a perfectly balanced binary search tree? Assume that n =2^k -1 for some positive integer...

There's a relatively new product in source code spell checking area that should help developers keep their code and GUI spell-clean. It's called Source Code Spell Checker by Parasite Software - http://www.parasitesoft.com/scsc.html

Hey...I am working on a project for school. I preface this so everyone understands that I don't want the full answer, rather a nudge in the correct direction. The following code section is supposed parse in a url from the command line. For some reason, I am not parsing the command line properly. Can someone help nudge me towards the...

Hi, i'm bulding a multi platform app under windows/linux/osx an i have a bit of trouble exporting c++ symbols from a dynamic library... Under windows, i compile a dll exporting symbols using : __declspec(dllexport) & __declspec(dllimport) I do export non-static and static members from my c++ code

A 'C' program that takes two numbers and produces two other numbers. None of the four numbers must be similar. printf ("%d%d", & num1, & num2) ; if (num1 > num2) { num1 ++ ; num2 -- ; } else { num1 --; num2 ++ ; }

Hi, In my code, I have a function which has a return value in the declaration: bool myFunction( int a) { // my implmentation }

I have code: std::string s(1,'A'); for(int i=0;i<26;i++) { s = s{0] + 1; } what I expect is get A,B,C...Z. But I only got A,C,E,...

I have some test code which demonstrates the problem. I know I could solve this by just returning a pointer, but I better use a reference. In real code, what I actually want to return is a reference to an array of function pointers. But the code below is good enough to show the problem. Thanks. #define MAX_DEC 11

Hi there, I got a tough interview questions lately, and I would like to hear your opinion: An array of N chars is given Write an efficient algorithm to find all the repeating substring with a minimal size of 2

Hello- I am trying to write a snippet which will open a text file with an integer on each line. I would like to read the last integer in the file. I am currently using: file = fopen("f.txt", "r+"); fseek(file, -2, SEEK_END); fscanf(file, "%d", &c); this works fine if the integer is only a single character. When I get into larger...

Hi! <OT, background> I am in a situation where I use two compilers from different vendors to compile my program. It seems that recently, due to a misconfiguration, library conflict or my ignorance, with one of the compilers I am having trouble related to libuwind.so, which, to my knowledge, deals with the intricacies of unwinding the...

Is there a function to find the length, in wide characters, of a multibyte string?

Is C++ Exception handling useful? think it is too complicated.

Hi I’m having problems with the following method… It works for the ‘@user’ bit (i.e. it takes in the user variable and works within the sql command). But the @column variable still is not working somehow. It’s probably something to do with the way I’ve phrased the actual sql statement.

I have run the formulas in the publically available c89 draft through eqn and groff, and the result is at <http://random.yi.org/~random/c89_formulas.pdf>

Greetings, I'm in the process of refactoring some code, and have determined that I need a map (or some other dictionary structure) to maintain a small list of key-value pairs. This is follow-on work from parallel development done in Java, so I'm working to a spec based on exposed methods. I've cooked up some prototypes based on...

This won't compile for me, it's saying "wcslen" isn't defined in the "std" namespace: #include <cwchar> int main() { std::wcslen("monkey"); }

Is there a listing of what the compile errors mean? For example: "hdb_log.c", line 163.22: 1506-046 (S) Syntax error. "hdb_log.c", line 160.20: 1506-098 (E) Missing argument(s). make: 1254-004 The error code from the last command is 1. How do I find out what 1506-046 and 1506-098 mean? Thanks for any help.

Hello NG, My Lint and my compiler disagree on whether this is valid code: typedef int test_t(char *); typedef int contest_t(const char *); extern contest_t somefunction; test_t *mypointer = somefunction; I think the assignment is clean in what it does, but who cares? - What's

Hi, For two stl strings s1 and s2, I got different results from strcmp(s1.c_str(), s2.c_str()) and s1.compare(s2) can someone explain what these functions do? It seems that strcmp gives the "right" (i.e.wysiwyg) answer while compare() does not.

Hi there, I got a tough interview questions lately, and I would like to hear your opinion: An array of N chars is given Write an efficient algorithm to find all the repeating substring with a minimal size of 2

Can Any one tell me why this program is crashing . testFunc() { int a1, *ptr ; f=&a1; f=f+1; return 0; }

Is it legal to do this: using std::out, std::cin, std::endl; If not, why not? -- http://www.munted.org.uk "Honestly, what can I possibly say to get you into my bed?" - Anon.

Hi, just in the process of maintaining some software that used some funy old string library and char*s , and we are updating everything to use std::strings. (or should I say std::basic_string<>s) I find it wierd that that all the new c++ ansi style librarys like the streams and file handling classes still expect us to use old style char*...