Day 21: Generics

落日映苍穹つ 2022-02-24 12:22 171阅读 0赞

# 题目： #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3podWlxaXV6aHVveXVlNTgz_size_16_color_FFFFFF_t_70][]

# C++： #

#include <stdlib.h>
    #include <stdio.h>
    #include <string>
    #include <vector>
    #include <map>
    #include <stack>
    #include <queue>
    #include <algorithm>
    #include <math.h>
    #include <stdexcept>
    #include <exception>
    #include <iostream>
    
    using namespace std;
    
    /**
    *    Name: printArray
    *    Print each element of the generic vector on a new line. Do not return anything.
    *    @param A generic vector
    **/
    
    
    // Write your code here
    template <typename T> 
    void printArray(vector<T> valList)
    {
        //for (auto val : valList)//C++11新增的对vector的迭代输出
        //{
        //	cout << val << endl;
        //}
    
        int count = valList.size();
        for (int i = 0; i < count; i++)
        {
    	cout << valList[i] << endl;
        }
    }
    
    int main() {
        int n;
    
        cin >> n;
        vector<int> int_vector(n);
        for (int i = 0; i < n; i++) {
    	int value;
    	cin >> value;
    	int_vector[i] = value;
        }
    
        cin >> n;
        vector<string> string_vector(n);
        for (int i = 0; i < n; i++) {
    	string value;
    	cin >> value;
    	string_vector[i] = value;
        }
    
        printArray<int>(int_vector);
        printArray<string>(string_vector);
    
        system("pause");
        return 0;
    }

参考：[https://blog.csdn.net/myruo/article/details/79692263][https_blog.csdn.net_myruo_article_details_79692263]

# 总结： #

## C++： ##

### vector的定义： ###

int n;
    
    cin >> n;
    vector<int> int_vector(n);
    for (int i = 0; i < n; i++) {
        int value;
        cin >> value;
        int_vector[i] = value;
    }

### vector的遍历输出： ###

方式一：
    for (auto val : valList)//C++11新增的对vector的迭代输出
    {
        cout << val << endl;
    }
    
    
    方式二：
    int count = valList.size();
    for (int i = 0; i < count; i++)
    {
        cout << valList[i] << endl;
    }

### 泛型，函数模板 ###

template <typename T>       //声明使用模板,并定义T是一个模板类型
    
    void Swap(T& a, T& b)           //紧接着使用T
    {
        T c = a;
        a = b;
        b = c;
    }

参考：[https://www.cnblogs.com/xylc/p/3653036.html][https_www.cnblogs.com_xylc_p_3653036.html]

[           https://www.cnblogs.com/cxq0017/p/6076856.html][https_www.cnblogs.com_cxq0017_p_6076856.html]

[https://www.cnblogs.com/lifexy/p/8761325.html][https_www.cnblogs.com_lifexy_p_8761325.html]

[https://www.cnblogs.com/study-development/p/4215687.html][https_www.cnblogs.com_study-development_p_4215687.html]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3podWlxaXV6aHVveXVlNTgz_size_16_color_FFFFFF_t_70]: /images/20220224/daebc0f3ce4f45b6acc1699bf00fa9cc.png
[https_blog.csdn.net_myruo_article_details_79692263]: https://blog.csdn.net/myruo/article/details/79692263
[https_www.cnblogs.com_xylc_p_3653036.html]: https://www.cnblogs.com/xylc/p/3653036.html
[https_www.cnblogs.com_cxq0017_p_6076856.html]: https://www.cnblogs.com/cxq0017/p/6076856.html
[https_www.cnblogs.com_lifexy_p_8761325.html]: https://www.cnblogs.com/lifexy/p/8761325.html
[https_www.cnblogs.com_study-development_p_4215687.html]: https://www.cnblogs.com/study-development/p/4215687.html