std::toupper
STD：：Touch
| Defined in header | | |
|---|---|---|
| int toupper( int ch | | |
根据当前安装的C语言环境定义的字符转换规则，将给定字符转换为大写字符。
在默认的“C”区域设置中，以下小写字母abcdefghijklmnopqrstuvwxyz被相应的大写字母替换。ABCDEFGHIJKLMNOPQRSTUVWXYZ...
参数
| ch | - | character to be converted. If the value of ch is not representable as unsigned char and does not equal EOF, the behavior is undefined. |
|---|
返回值
转换字符或ch如果当前C语言环境没有定义大写版本。
例
二次
#include <iostream>
#include <cctype>
#include <clocale>
int main()
{
unsigned char c = '\xb8'; // the character ž in ISO-8859-15
// but ¸ (cedilla) in ISO-8859-1
std::setlocale(LC_ALL, "en_US.iso88591"
std::cout << std::hex << std::showbase;
std::cout << "in iso8859-1, toupper('0xb8') gives " << std::toupper(c) << '\n';
std::setlocale(LC_ALL, "en_US.iso885915"
std::cout << "in iso8859-15, toupper('0xb8') gives " << std::toupper(c) << '\n';
}
二次
产出：
二次
in iso8859-1, toupper('0xb8') gives 0xb8
in iso8859-15, toupper('0xb8') gives 0xb4
二次
另见
| 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) |
C文件
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