本例主要演示C语言中的各种string操作方法,包括std::tolower,std::toupper,std::isalpha,std::isalnum,等等。 代码如下,...
s2.stringup();//converts string to uppercasecout <<"The string\n"<< s2 <<"\ncontains"<< s2.has('A')<<"'A' characters in it.\n"; s1="red";//String(const char *),//then String & operator=(const String&)String rgb[3] = { String(s1), String("green"), String("blue")...
@brief Convert a string to lowercase. @param in String to convert. @param out Output buffer. @param len Size of the out buffer. @return ptr to the out buffer or NULL if an error occured.This function convert a string into lowercase. At most len - 1 elements of the input string will...
Conversion to C-style arrays Many functions (including all C functions) expect strings to be formatted as C-style strings rather than std::string. For this reason, std::string provides 3 different ways to convert std::string to C-style strings. ...
```c char lowercase = 'a'; char uppercase = lowercase - 32; printf("转换后的大写字母为:%c\n", uppercase); ``` 将小写字母全部转换成大写字母的C语言程序 将小写字母全部转换成大写字母的 C 语言程序 题目:从键盘输入一个字符串,将小写字母全部转换成大写字母, 然后输出到一个磁盘文件“test”中...
#include <iostream> #include <cctype> int main() { char c = 'A'; char lower = tolower(c) + '0'; std::cout << "Character: " << c << std::endl; std::cout << "Lowercase digit: " << lower << std::endl; return 0; } 输出结果为: 代码语言:txt 复制 Character: A L...
注意到StringCharCode方法,如果要写成小写,则把返回值写成arrayB.toLowerCase();如果返回一个不区分大小写的字符串, 则把注释去掉.如果要返回一个不指定长度的字符串,则可以把入口参数赋值为random(n);这样只指定其上限.此函数也可以用 randomAscii函数实现,留给大家自己思考. ...
std::string line; // empty string while(std::getline(std::cin, line)) { // read line at time until end-of-file std::cout << line << std::endl; // write s to the output } return 0; } Name: getline 这个函数接受两个參数:一个输入流对象和一个 string 对象。getline 函数从输入流...
#include <string> int main() { std::string line; // empty string while(std::getline(std::cin, line)) { 1. 2. 3. 4. 5. 6. 7. // read line at time until end-of-file std::cout << line << std::endl; // write s to the output ...