Hi Could someone please help with this? I have the following: // part_1 if (pthread_create(&threadID, NULL, ThreadMain, (void *) clientSocket) != 0) { cerr << "Unable to create thread" << endl; exit(1); } // part_2 void *ThreadMain(void *clientSocket) { pthread_detach(pthread_self()); ... delete (TCPSocket *) c...
hi Could someone please tell me if this is possible in C or C++? void fun_a(); //int fun_b(); ... main(){ ... fun_a(); ... int fun_b(){ ... } ... } or something similar, as e.g. a class inside a function? thanks for your replies, ...
I need to implement qsort in C and sort in reverse lexicographical order. I'm confused on how to create and call the comparison function. This is what I have so far.. qsort (strArr, numLines, sizeof(char*) , sort); int sort(const void * str1, const void * str2) { return (-1) * strcasecmp((char*) str1, (char*) str2); }; Eclipse is te...
How to create a directory with C code (other than the method of forking and using mkdir) ? Is there anything like dirent.h? dirent.h only allows to read directories. (without using external library) ...
Possible Duplicate: Delete folder with items How to delete a non empty directory in C or C++? Is there any function? rmdir only deletes empty directory. Please provide a way without using any external library. Also tell me how to delete a file in C or C++? ...
I'm writing a small program with the OpenSSL library that is suppose to establish a connection with an SSLv3 server. This server dispenses a self-signed certificate, which causes the handshake to fail with this message: "sslv3 alert handshake failure, self signed certificate in certificate chain." Is there a way I can force the connecti...
I am calculating g with e and s, which are all doubles. After that I want to cut off all digits after the second and save the result in x, for example: g = 2.123 => x = 2.12 g = 5.34995 => x = 5.34 and so on. I Use... g = 0.5*e + 0.5*s; x = floor(g*100)/100; ...and it works fine most of the time. But sometimes I get strange results...
I am using VC++ 2008 express edition for C. When I try to run this: /* Demonstrates printer output. */ #include <stdio.h> main() { float f = 2.0134; fprintf(stdprn, "This message is printed.\n\n"); fprintf(stdprn, "And now some numbers:\n\n"); fprintf(stdprn, "The square of %f is %f.", f, f*f); /* Send a form feed */ fprintf...
Hey Guys My aim is to write an app which generates an char - array (each should be random-filled with strings of the length 4) and sorts this array. The time this process takes should be measured. I coded the following: #include <string.h> #include <jni.h> #include <time.h> #include <math.h> clock_t start, finish; static int ARRAY_LEN...
How the memory management unit(MMU) detects the double free of a pointer? I know that its a good practice to make the pointer NULL just after freeing it, but suppose programmer does not do it. Is there any MMU mechanism to detect it? ...
C-strings are null-terminated which means that in a char-array, the char at index strlen() is a byte with all bits set to 0. I've seen code where, instead of '\0', the integer 0 is used. But since sizeof(int) > sizeof(char), this might actually write beyond the allocated space for the array - am I wrong? Or does the compiler implicitely ...
I am having trouble understanding how to assign memory to a double pointer. I want to read an array of strings and store it. char **ptr; fp=fopen("file.txt","r"); ptr=(char**)malloc(sizeof(char*)*50); for(int i=0;i<20;i++) { ptr[i]=(char*)malloc(sizeof(char)*50); fgets(ptr[i],50,fp); } instead of thi...
I am implementing a stack and while it was a no-brainer to implement the basic operations push and pop, I am wondering how to implement somewhat efficient searching. The underlying structure is a linked list ...
Hi, I have come across a very odd problem in C that I have never encountered before. I have narrowed it down to the following very simple snippet. The variables are global and of type: int cpd; int nPart; And here is the relevant code snippet which I gradually stripped down to the very minimum needed to produce the issue: ...
Why does this code produce the warning? FILE* my_open_file(char* filename) { FILE* fp=fopen(filename,"r"); if(fp==NULL) { perror("Error opening file"); return -1; } return fp; } asdf.c: In function ‘my_open_file’: asdf.c:9: warning: return makes pointer from integer without a cast fp is already a pointer, ...
What is "stack thrash"? Or "a stack thrash"? (Since I don't know the definition I'm not sure if it is a countable or uncountable term.) ...
I read the documentation and it says that a long is %li but the print out comes back as -2147024891. What gives? ...
Hi, i'm a little stuck on getting a plugin to work. I need it to take a "src" parameter but I can't seem to make it do this. So i've basically got the npsimple basic plugin. It's probably something really silly i'm missing Joe ...
I need to MPI_Gatherv() a number of int/string pairs. Let's say each pair looks like this: struct Pair { int x; unsigned s_len; char s[1]; // variable-length string of s_len chars }; How to define an appropriate MPI datatype for Pair? ...
Hello I can't truly understand why the free process returns in an error. I got this code in C: int LuffarschackStart(void) { /* to avoid the program from closing */ char readEnd; int i = 0; board_type *board = malloc(sizeof(square_type)); if (board == NULL) { printf("Could not allocate the memory needed..."); scanf("%c", &...