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math - How to use nan and inf in C? - Stack Overflow 18 Dec 2009 · In C99, the C header <math.h> defines nan(), nanf(), and nanl() that return different representations of NaN (as a double, float, and int respectively), and infinity (if avaliable) could …
What is the difference between %f and %lf in C? - Stack Overflow 16 Sep 2014 · Specifies that a following d, i, o, u, x, X, or n conversion specifier applies to an argument with type pointer to long int or unsigned long int; that a following a, A, e, E, f, F, g, or …
Convert char to int in C and C++ - Stack Overflow 17 Feb 2011 · typedef unsigned char UChar; char myCppFunc( char c ) { return char( someCFunc( UChar( c ) ) ); } The expression UChar( c ) converts to unsigned char in order to …
How to solve npm install error “npm ERR! code 1” - Stack Overflow 5 May 2021 · npm ERR! code 1 npm ERR! path PATH\node_modules\lmdb-store npm ERR! command failed npm ERR! command C:\Windows\system32\cmd.exe /d /s /c node-gyp-build I …
c - What does 'u' mean after a number? - Stack Overflow 1 Feb 2021 · Integer literals like 1 in C code are always of the type int. int is the same thing as signed int. One adds u or U (equivalent) to the literal to ensure it is unsigned int, to prevent …
Implicit function declarations in C - Stack Overflow 31 Mar 2019 · Because of historical reasons going back to the very first version of C, it passes whatever type the argument is. So it could be an int or a double or a char*. Without a …
What does `scanf ("%* [^\n]%*c")` mean? - Stack Overflow 6 May 2015 · It is better to use. scanf("%*[^\n]"); scanf("%*c"); to clear the stdin.This is because, in the former case (single scanf), %*[^\n] will fail when the first character to be scanned is the …
c++ - Qt/Qt Creator - The program has unexpectedly finished. 8 Feb 2014 · I'm somewhat new to C++ and to Qt 5.2.1. I'm actually learning how to use Qt. To do it as easy as possible, I'm using Qt Creator 3.0.1. I've written this little piece of code in the …
Operator in C: not greater and equal to. - Stack Overflow 2 Nov 2012 · Just change it to (f < i) which is !(f >= i). Note: this is not the case if either f or i is NaN. This is because f >= i will evaluate to false if either is NaN leading to !(f >= i) evaluating …
Which is the best way to get input from user in C? 14 Feb 2012 · The scanf is the standard method to get formatted input in C, and fgets/fgetc is the recommended standard function to get whole lines or single characters. Most other functions …