5 ways to create an Array of String
- Using Pointers
- Using 2-D Array
- Using the String Class
- Using the Array Class
- Using the Vector Class
Conclusion: Out of all the methods, Vector seems to be the best way for creating an array of Strings in C++.
1. Using Pointers
#include <iostream>
const char* colors[4] = {"blue", "red", "green", "yellow"}; // const was added because string literals (literally, the quoted strings) exist in a read-only area of memory
for (int i = 0; i < 4; i++) { std::cout << colors[i] << std::endl;}
2. Using 2-D Array
#include <iostream>
char colors[][10] = {"blue", "red", "green", "yellow"}; // multidimensional array must have bounds for all dimensions except the first
for (int i = 0 ; i < 4; i++) { std::cout << colors[i] << std::endl;}
3. Using the String Class
The strings are also mutable.
#include <iostream>
#include <string>
std::string colors[] = {"blue", "red", "green", "yellow"};
for (int i = 0 ; i < 4; i++) { std::cout << colors[i] << std::endl;}
4. Using the Array Class
An array is a homogeneous mixture of data that is stored continuously in the memory space. The STL container array can be used to allocate a fixed-size array. It may be used very similarly to a vector, but the size is always fixed.
#include <iostream>
#include <string>
#include <array>
std::array<std::string, 4> colors {"blue", "red", "green", "yellow"};
for (int i = 0; i < 4 ; i++) { std::cout << colors[i] << "\n";}
5. Using the Vector Class
Both the number of strings and string contents are mutable.
#include <iostream>
#include <string>
#include <vector>
std::vector<std::string> colors {"blue", "red", "green"};
colors.push_back("yellow");
for (int i = 0; i < colors.size() ; i++) { std::cout << colors[i] << "\n";}
Tokenize (Split)
Tokenizing a string denotes splitting a string with respect to some delimiter(s).
4 Ways:
- Using stringstream
- Using strtok()
- Using strtok_r()
- Using std::sregex_token_iterator
1. Using stringstream
2. Using strtok()
3. Using strtok_r()
4. Using std::sregex_token_iterator
原文链接: https://www.cnblogs.com/shendaw/p/17104656.html
欢迎关注
微信关注下方公众号,第一时间获取干货硬货;公众号内回复【pdf】免费获取数百本计算机经典书籍
原创文章受到原创版权保护。转载请注明出处:https://www.ccppcoding.com/archives/316881
非原创文章文中已经注明原地址,如有侵权,联系删除
关注公众号【高性能架构探索】,第一时间获取最新文章
转载文章受原作者版权保护。转载请注明原作者出处!