ctype

brew install open-mpi fails

由 别来无恙 提交于 2021-02-10 23:14:54
问题 Trying to install openmpi , read that: Could not determine if REAL*16 bit-matches C type Ran brew doctor, and it's giving me: Your system is raring to brew full output % brew install open-mpi ==> Downloading http://www.open-mpi.org/software/ompi/v1.6/downloads/openmpi-1.6. Already downloaded: /Library/Caches/Homebrew/open-mpi-1.6.4.tar.bz2 ==> Using Homebrew-provided fortran compiler. This may be changed by setting the FC environment variable. ==> ./configure --prefix=/usr/local/Cellar/open

brew install open-mpi fails

由 半腔热情 提交于 2021-02-10 23:14:53
问题 Trying to install openmpi , read that: Could not determine if REAL*16 bit-matches C type Ran brew doctor, and it's giving me: Your system is raring to brew full output % brew install open-mpi ==> Downloading http://www.open-mpi.org/software/ompi/v1.6/downloads/openmpi-1.6. Already downloaded: /Library/Caches/Homebrew/open-mpi-1.6.4.tar.bz2 ==> Using Homebrew-provided fortran compiler. This may be changed by setting the FC environment variable. ==> ./configure --prefix=/usr/local/Cellar/open

brew install open-mpi fails

由 霸气de小男生 提交于 2021-02-10 23:13:02
问题 Trying to install openmpi , read that: Could not determine if REAL*16 bit-matches C type Ran brew doctor, and it's giving me: Your system is raring to brew full output % brew install open-mpi ==> Downloading http://www.open-mpi.org/software/ompi/v1.6/downloads/openmpi-1.6. Already downloaded: /Library/Caches/Homebrew/open-mpi-1.6.4.tar.bz2 ==> Using Homebrew-provided fortran compiler. This may be changed by setting the FC environment variable. ==> ./configure --prefix=/usr/local/Cellar/open

Getting an Array/Vector from PARI/GP in Python using Ctypes

由 房东的猫 提交于 2020-04-17 21:14:59
问题 I have written a code to compare the solution of sympy and PARI/GP , how ever I am facing a problem to get an array/vector from PARI/GP. When I try to return the vector res from PARI/GP function nfroots , I get a address like this (see the last line) - [3, 4] elements as long (only if of type t_INT): 3 4 <__main__.LP_LP_c_long object at 0x00000000056166C8> how can I get the res as vector/array from nfroots so I can use that array like normal python vector/array? The code is given below to

Return malloc'ed array from C to Python using ctypes

由 早过忘川 提交于 2020-01-04 05:52:06
问题 I am looking to use some C code that returns multiple arrays of unknown size. Because there are multiple arrays, I think I need to use passed in pointers, and I'm not sure how to combine that with malloc, which is used to setup the arrays. This is some representative C code: #include <stdint.h> #include <stdio.h> #include <stdlib.h> //gcc -fPIC -shared -o array_test_c.so array_test_c.c void return_array(int * outdata1v, int * outdata2v) { int i; int N = 10; int * mydatav2, * mydatav3;

How to check if a string is a letter(a-z or A-Z) in c

由 别说谁变了你拦得住时间么 提交于 2019-12-24 06:35:02
问题 I am getting user input, and I want to determine if the user has entered a letter , an integer, or an operator. I can successfully determine if it is an integer using sscanf, but I am stumped on how to determine if it is a letter. By letter, I mean: A-Z, a-z. int main(){ char buffer[20]; int integer; printf("Enter expression: "); while (fgets(buffer, sizeof(buffer), stdin) != NULL){ char *p = strchr(buffer, '\n'); //take care of the new line from fgets if (p) *p = 0; //Buffer will either be a

How can I check to see if a string contains characters of whitespace/alphanumeric/etc?

由 这一生的挚爱 提交于 2019-12-20 10:27:27
问题 How can you use the "ctype.h" library in Swift to be able to use isAlpha or isSpace on characters? Or is there a better, Swift, way of doing it? This question is answered, but it doesn't seem to work: Swift: how to find out if letter is Alphanumeric or Digit It doesn't specify how to import the library. Could someone point me in the right direction? Here's what I've got so far: extension String { subscript (i : Int) -> String { return String(Array(self)[i]) } } let whitespace = NSCharacterSet

Is cout Guaranteed to Have the ctype<char> facet?

由 ﹥＞﹥吖頭↗ 提交于 2019-12-10 16:20:06
问题 Given: auto foo = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"s I can convert all the characters to lowercase by: use_facet<ctype<char>>(cout.getloc()).tolower(data(foo), next(data(foo), foo.size())); Live Example But this depends upon cout.getloc() containing the ctype<char> facet . Presuming that I'm using an unmodified cout can I assume that cout.getloc() will contain the facet ctype<char> or do I need to confirm this before use with: has_facet<ctype<char>>(cout.getloc()) 回答1: From cppreference: Each

Does ctype.h still require unsigned char?

由 孤人 提交于 2019-12-03 18:03:18
问题 Traditionally, it was - strictly speaking - an error to pass a signed char to the ctype.h predicates because they were only defined for -1 to 255, so -128 to -2 could end up in reading outside array bounds. Was this ever fixed, or do you still strictly speaking have to use unsigned char to avoid undefined behaviour in modern versions of C? 回答1: do you still strictly speaking have to use unsigned char to avoid undefined behavior in modern versions of C? Yes, from the C11 draft standard section

How can I check to see if a string contains characters of whitespace/alphanumeric/etc?

由 北战南征 提交于 2019-12-02 22:38:00
How can you use the "ctype.h" library in Swift to be able to use isAlpha or isSpace on characters? Or is there a better, Swift, way of doing it? This question is answered, but it doesn't seem to work: Swift: how to find out if letter is Alphanumeric or Digit It doesn't specify how to import the library. Could someone point me in the right direction? Here's what I've got so far: extension String { subscript (i : Int) -> String { return String(Array(self)[i]) } } let whitespace = NSCharacterSet.whitespaceCharacterSet() let phrase = "Test case" for var i=0; i<countElements(phrase); i++ { if
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