C/C++编程：打印任何容器&&生成随机数组

川长思鸟来 2023-02-26 06:28 37阅读 0赞

# 打印任何容器 #

#include <iostream>
    #include <list>
    #include <vector>
    #include <map>
    
    template<typename T>
    std::ostream& print(std::ostream &out,T const &val) {
        
        return (out << val << " ");
    }
    
    template<typename T1,typename T2>
    std::ostream& print(std::ostream &out,std::pair<T1,T2> const &val) {
        
        return (out << "{" << val.first << " " << val.second << "} ");
    }
    
    template<template<typename,typename...> class TT,typename... Args>
    std::ostream& operator<<(std::ostream &out,TT<Args...> const &cont) {
        
        for(auto&& elem : cont) print(out,elem);
        return out;
    }
    int main() {
        
        std::vector<int> vector = {
        5, 9, 6, 8, 9};
        std::cout << vector << "\n";
    
    
    
        std::list<int> list = {
        5, 9, 6, 8, 9};
        std::cout << list << "\n";
    
    
        std::map<int, int> map = {
        {
        1, 2}, {
        3, 4}};
        std::cout << map;
    
        return 0;
    }

![在这里插入图片描述][ff3413b800f240d6befb289e598f384f.png]

# 生成随机数组 #

void  generateRandomArray(std::vector<int> &vec, int n, int rangeL, int rangeR) {
        
        assert(rangeL <= rangeR);
        int t;
        srand(time(NULL)); // 随机种子
        for (int i = 0; i < n; i++){
        
            t = rand() % (rangeR - rangeL + 1) + rangeL;
            vec.push_back(t);
        }
    }
    
    
    
    int main() {
        
        std::vector<int> vec;
        generateRandomArray(vec, 10, 0, 9);
        std::cout << vec;
        
    
        return 0;
    }

# 如何往一个vector数组中整体加入另一个vector数组 #

vector<int> v1 {
        2233},v2 {
        2, 3, 6};
    
        v1.insert(v1.end(),v2.begin(),v2.end());
    
        std::cout << v1;

![在这里插入图片描述][71af596977d842328c07a21391beab6b.png]

[ff3413b800f240d6befb289e598f384f.png]: /images/20230209/e6cab235b2f746f78ab8294b13a23ac8.png
[71af596977d842328c07a21391beab6b.png]: /images/20230209/1867546e6ef34581b652186633110352.png