c++ Programming Glossary: isdigit

http://stackoverflow.com/questions/10178830/input-validation-for-numeric-input

bool valNum true for unsigned iDx 0 iDx sN.length iDx if isdigit sN iDx valNum false break if valNum cout Wrong entry Try..

Inputting elements of unknown type into a vector

http://stackoverflow.com/questions/10969040/inputting-elements-of-unknown-type-into-a-vector

may be among digits and ' ' char const first s.at 0 if not isdigit first and first ' ' return false Subsequent characters may only.. characters may only be digits for char c s.substr 1 if not isdigit c return false Looks like it is an int return true isInt Note.. be among digits '.' and ' ' char const first s.at 0 if not isdigit first and first '.' and first ' ' return false There may only..

How do I check if a C++ string is an int?

http://stackoverflow.com/questions/2844817/how-do-i-check-if-a-c-string-is-an-int

inline bool isInteger const std string s if s.empty isdigit s 0 s 0 ' ' s 0 ' ' return false char p strtol s.c_str p 10..

How to negate a predicate function using operator ! in C++?

http://stackoverflow.com/questions/4583310/how-to-negate-a-predicate-function-using-operator-in-c

unary_function bool char bool operator char c const return isdigit c std unary_negate my_is_digit operator const my_is_digit rhs..

How to determine if a string is a number with C++?

http://stackoverflow.com/questions/4654636/how-to-determine-if-a-string-is-a-number-with-c

or Windows is schizophrenic bool isParam string line if isdigit atoi line.c_str return true return false c visual c share.. s std string const_iterator it s.begin while it s.end std isdigit it it return s.empty it s.end Or if you want to do it the C.. return s.empty std find_if s.begin s.end char c return std isdigit c s.end As pointed out in the comments below this only works..

xutility file?

http://stackoverflow.com/questions/4707310/xutility-file

n return 1 storage cvCreateMemStorage 0 if input_name isdigit input_name 0 input_name 1 ' 0' capture cvCaptureFromCAM input_name.. frame_copy cvReleaseCapture capture else if input_name isdigit input_name 0 input_name 1 ' 0' cvNamedWindow result 1 const..

Should I include stddef.h or cstddef?

http://stackoverflow.com/questions/5079325/should-i-include-stddef-h-or-cstddef

but the set differs from the C rules. In C EXIT_FAILURE isdigit getc a.o. are macros. Do you know which ones are macros in C..

How does atoi() function in C++ work?

http://stackoverflow.com/questions/5710091/how-does-atoi-function-in-c-work

value 0 int sign 1 if c ' ' c ' ' if c ' ' sign 1 c while isdigit c value 10 value int c '0' c return value sign You loop through..

Undefined reference to 'vtable for xxx'

http://stackoverflow.com/questions/7665190/undefined-reference-to-vtable-for-xxx

bool isNum string str for int i 0 i str.length i if isdigit str i 1 cerr Error Input Number must be a Positive Integer the..

Compiler warning: lambda return type cannot be deduced

http://stackoverflow.com/questions/8582610/compiler-warning-lambda-return-type-cannot-be-deduced

str.begin str.end std back_inserter str2 char c if std isdigit c return true warning here else return false std cout str2.. warning using trailing return type or simply saying return isdigit c but I'm curious since compiler doesn't warn for nothing or..

how to check if given c++ string or char* contains only digits?

http://stackoverflow.com/questions/8888748/how-to-check-if-given-c-string-or-char-contains-only-digits

Are the character digits ['0'..'9'] required to have contiguous numeric values?

http://stackoverflow.com/questions/9416926/are-the-character-digits-0-9-required-to-have-contiguous-numeric-values

'9' 9 n I cannot find it mentioned in the documentation of isdigit classification 22.3.3.1 Character classification nor can I find.. to cache the ctype facet and use it directly instead of isdigit et al end comment or use the vector form of ctype is. c numbers..