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std::strspn(3) C++ Standard Libary std::strspn(3) NAME std::strspn - std::strspn Synopsis Defined in header <cstring> size_t strspn( const char* dest, const char* src ); Returns the length of the maximum initial segment (span) of the byte string pointed to by dest, that consists of only the characters found in byte string pointed to by src. Parameters dest - pointer to the null-terminated byte string to be analyzed src - pointer to the null-terminated byte string that contains the characters to search for Return value The length of the maximum initial segment that contains only charac- ters from byte string pointed to by src Example // Run this code #include <cstring> #include <string> #include <iostream> const char *low_alpha = "qwertyuiopasdfghjklzxcvbnm"; int main() { std::string s = "abcde312$#@"; std::size_t spnsz = std::strspn(s.c_str(), low_alpha); std::cout << "After skipping initial lowercase letters from '" << s << "'\nThe remainder is '" << s.substr(spnsz) << "'\n"; } Output: After skipping initial lowercase letters from 'abcde312$#@' The remainder is '312$#@' See also returns the length of the maximum initial segment that con- sists strcspn of only the characters not found in another byte string (function) returns the length of the maximum initial segment that con- sists wcsspn of only the wide characters found in another wide string (function) strpbrk finds the first location of any character from a set of sep- arators (function) http://cppreference.com 2022.07.31 std::strspn(3)
NAME | Synopsis | Parameters | Return value | Example | Output: | See also
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