While reading about printf(),I found that it can print numbers as positive or negative as desired by the user by following code(for -).But the code doesnt work and the output is a positive value.Please mention where the error is.Thanks #include<stdio.h> int main() { printf (" %-d\n", 1977); return 0; } ...
I practiced an array of strings with no initial values. Attempt 1 #include <stdio.h> char *array[] = {}; int main(int argc, char *argv[]) { array[0]="Hello"; array[1]="World"; char **i = array; while (*i) { printf("%d %s\n", i, *i); i++; } } $ gcc array_of_strings.c && ./a.out 6293704 Hello 6293...
What is more efficient with the C code I am working with, moving my code into an existing C program or have an h file #included so it calls the separate .c file? When this is compiled into an .exe how does this work with having it incorporated into the original code vs having an h file and separate .c file? I am not sure how many lines...
#include "stdio.h" int main() { int x = -13701; unsigned int y = 3; signed short z = x / y; printf("z = %d\n", z); return 0; } I would expect the answer to be -4567. I am getting "z = 17278". Why does a promotion of these numbers result in 17278? I executed this in Code Pad. ...
I have to use this code but I get receive the following error: error c2036'Complex_Z 'unknown size typedef struct Complex_Z{ double r, i; } ; void update_projection_zprimme(struct Complex_Z *X, struct Complex_Z *Y, struct Complex_Z *Z, int numCols, int maxCols, int blockSize, struct Complex_Z *rwork, struct primme_param...
I am going to be making a program that reads in a line and gets up to 6 numbers. The program will eventually solve a a square matrix between 2x2 and 6x6. My question is what errors do I need to look for on the get_numb() function? I am thinking that the function will have to check character by character to make sure that the individ...
What is the Delphi equivalent of unsigned char** ' in C i'm not sure if its a pointer to an array or a pointer to a pointer or if the two things are the same in C. ...
main() { int i=0; for(i=0;i<20;i++) { switch(i) case 0: i+=5; case 1: i+=2; case 5: i+=5; default i+=4; break; } printf("%d,",i); } } this is frm aptitude question....plz explain hw this works??? ...
In the following code segment what will be the result of the function, value of x , value of y { unsigned int x=-1; int y; y = ~0; if(x == y) printf("same"); else printf("not same"); } Please explain how this works. From my side its answer will be "not same" but its actual answer is "same". ...
Does anyone have any idea of why this could happen? I have a C program in AIX 5.3, I've been asked to run it on a SPARC Solaris 10 machine, but when I did it, I noticed there was a buffer overflow with one of the many reckless strcat uses. My goal is not to sanitize the code but to provide a concrete and well founded answer of why does...
I am trying to reverse the order of words in a sentence by maintaining the spaces as below. [this is my test string] ==> [string test my is this] I did in a step by step manner as, [this is my test string] - input string [gnirts tset ym si siht] - reverse the whole string - in-place [string test my is this] - reverse t...
How do I install a C regex into MinGW? I'm using it's gcc... I'm running Windows XP. I prefer a updated one. Thank you. ...
I am supposed to implement a userlevel threads library in C. To do so, I need to implement yield(), createThread() and destroyThread() functions. I believe I've got the basics right: To keep track of threads, I'll use a queue of ThreadControlBlock elements (which resemble PCBs in an OS) that look like this: struct ThreadControlBlock { ...
Hi guys, I am using C to implement a packet stream that will be sent out via wireless and am stuck at the following problem. I have an unsigned int 2 bytes long, in the following format in binary: XXXX YYYY XXXX XXXX, where X & Y's are bits. Looking at the format above, I need to just changed the YYYY bits and leave the other bits alon...
Possible Duplicate: Typedef pointers a good idea? I've seen this oddity in many APIs I have used: typedef type_t *TYPE; My point is that declaring a variable of type TYPE will not make it clear that in fact a pointer is declared. Do you, like me, think that this brings a lot of confusion? Is this meant to enforce encapsula...
I want to know the size of the next UDP datagram in the system's queue. I found this question with a similar doubt, but using boost. The last answer (as of 2010/09/23) say something about using getsockopt with the SO_NREAD option in OS X, but I can't find anything about this with Windows (using Winsock). Here I found that I can use ioc...
From jmorecfg.h: #define PACK_TWO_PIXELS(l,r) ((r<<16) | l) #define PACK_NEED_ALIGNMENT(ptr) (((int)(ptr))&3) #define WRITE_TWO_PIXELS(addr, pixels) do { \ ((INT16*)(addr))[0] = (pixels); \ ((INT16*)(addr))[1] = (pixels)>>16; \ } while(0) #define WRITE_TWO_ALIGNED_PIXELS(addr, pixels) ((*(INT32*)(a...
Possible Duplicate: Variable length arrays in C++? I am just curious, is there any particular reason why C++ does not allow variable length arrays? ...
I would expect that there's some sort of library that I can use in this fashion: int* buffer[720*480]; // read in from file/memory/network stream raw_params params; params.depth = 16; params.width = 720; params.height = 480; params.map = "rgb"; params.interleave = JPEG_RAW_INTERLEAVE_OFF; jpeg_encode(buffer, params) But I can't seem ...
Given: typedef type-declaration synonym; I can see how: typedef long unsigned int size_t; declares size_t as a synonym for long unsigned int, however I (know it does but) can't see exactly how: typedef int (*F)(size_t, size_t); declares F as a synonym for pointer to function (size_t, size_t) returning int typedef's two operands...