std::toupper

From Cppreference

C++ Standard Library
Language Utilities library Strings library Containers library Algorithms library Iterators library Numerics library Input/output library Localizations library Regular expressions library (C++11) Atomic operations library (C++11) Thread support library (C++11)
Strings library
Narrow character strings Wide character strings Classes basic_string char_traits
Narrow null-terminated strings
Functions Character manipulation isalnum isalpha islower isupper isdigit isxdigit isblank (C++11) iscntrl isgraph isspace isprint ispunct tolower toupper Conversions to numeric formats atof atoi strtol strtoul strtof String manipulation strcpy strncpy strcat strncat strxfrm String examination strlen strcmp strncmp strcoll strchr strrchr strspn strcspn strpbrk strstr strtok Memory manipulation memchr memcmp memset memcpy memmove Miscellaneous strerror

Defined in header <cctype>
int toupper( int ch );

Converts the given character to uppercase.

[edit] Parameters

ch

-

character to be converted

[edit] Return value

converted character or ch if no such conversion was possible

[edit] See also

tolower	converts a character to lowercase (function)
toupper(std::locale)	converts a character to uppercase using the ctype facet of a locale (function template)
towupper	converts a wide character to uppercase (function)