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实验一c++

时间:2024-10-13 18:23:54浏览次数:6  
标签:begin cout int c++ v0 v1 实验 include

实验任务一

源代码:

 1 #include <iostream>
 2 #include <string>
 3 #include <vector>
 4 #include <algorithm>
 5 
 6 using namespace std;
 7 
 8 // 声明
 9 // 模板函数声明
10 template<typename T>
11 void output(const T &c);
12 
13 // 普通函数声明
14 void test1();
15 void test2();
16 void test3();
17 
18 int main() {
19     cout << "测试1: \n";
20     test1();
21 
22     cout << "\n测试2: \n";
23     test2();
24 
25     cout << "\n测试3: \n";
26     test3();
27 }
28 
29 // 函数实现
30 // 输出容器对象c中的元素
31 template <typename T>
32 void output(const T &c) {
33     for(auto &i: c)
34         cout << i << " ";
35     cout << endl;
36 }
37 
38 // 测试1
39 // 组合使用算法库、迭代器、string反转字符串
40 void test1() {
41     string s0{"0123456789"};
42     cout << "s0 = " << s0 << endl;
43 
44     string s1{s0};
45     reverse(s1.begin(), s1.end());  // 反转指定迭代器区间的元素
46     cout << "s1 = " << s1 << endl;
47 
48     string s2{s0};
49     reverse_copy(s0.begin(), s0.end(), s2.begin()); // 将指定迭代区间的元素拷贝到指定迭代器开始的目标区间,并且在复制过程中反转次序
50     cout << "s2 = " << s2 << endl;
51 }
52 
53 // 测试2
54 // 组合使用算法库、迭代器、vector反转动态数组对象vector内数据
55 void test2() {
56     vector<int> v0{2, 0, 4, 9};
57     cout << "v0: ";
58     output(v0);
59 
60     vector<int> v1{v0};
61     reverse(v1.begin(), v1.end());
62     cout << "v1: ";
63     output(v1);
64 
65     vector<int> v2{v0};
66     reverse_copy(v0.begin(), v0.end(), v2.begin());
67     cout << "v2: ";
68     output(v2);
69 }
70 
71 // 测试3
72 // 组合使用算法库、迭代器、vector实现元素旋转移位
73 void test3() {
74     vector<int> v0{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
75     cout << "v0: ";
76     output(v0);
77 
78     vector<int> v1{v0};
79     rotate(v1.begin(), v1.begin()+1, v1.end());  // 旋转指定迭代器区间[v1.begin(), v1.end())之间的数据项,旋转后从迭代器v1.begin()+1位置的数据项开始
80     cout << "v1: ";
81     output(v1);
82 
83     vector<int> v2{v0};
84     rotate(v2.begin(), v2.begin()+2, v2.end());
85     cout << "v2: ";
86     output(v2);
87 
88     vector<int> v3{v0};
89     rotate(v3.begin(), v3.end()-1, v3.end());
90     cout << "v3: ";
91     output(v3);
92 
93     vector<int> v4{v0};
94     rotate(v4.begin(), v4.end()-2, v4.end());
95     cout << "v4: ";
96     output(v4);
97 }
View Code

运行结果截图:

实验任务二

源代码:

 1 #include <iostream>
 2 #include <vector>
 3 #include <string>
 4 #include <algorithm>
 5 #include <numeric>
 6 #include <iomanip>
 7 
 8 using namespace std;
 9 
10 // 函数声明
11 // 模板函数声明
12 template<typename T>
13 void output(const T &c);
14 
15 // 普通函数声明
16 int rand_int_100();
17 void test1();
18 void test2();
19 
20 int main() {
21     cout << "测试1: \n";
22     test1();
23 
24     cout << "\n测试2: \n";
25     test2();
26 }
27 
28 // 函数实现
29 // 输出容器对象c中的元素
30 template <typename T>
31 void output(const T &c) {
32     for(auto &i: c)
33         cout << i << " ";
34     cout << endl;
35 }
36 
37 // 返回[0, 100]区间内的一个随机整数
38 int rand_int_100() {
39     return rand() % 101;
40 }
41 
42 // 测试1
43 // 对容器类对象指定迭代器区间进行赋值、排序
44 void test1() {
45     vector<int> v0(10);  // 创建一个动态数组对象v0, 对象大小为10
46     generate(v0.begin(), v0.end(), rand_int_100); // 产生[0, 100]之间的随机整数赋值给指定迭代器区间[v0.begin(), v0.end())内的每个数据项
47     cout << "v0: ";
48     output(v0);
49 
50     vector<int> v1{v0};
51     sort(v1.begin(), v1.end()); // 对指定迭代器区间[v1.begin(), v1.end())内数据项进行升序排序
52     cout << "v1: ";
53     output(v1);
54 
55     vector<int> v2{v0};
56     sort(v2.begin()+1, v2.end()-1); // 对指定迭代器区间[v1.begin()+1, v1.end()-1)内数据项进行升序排序
57     cout << "v2: ";
58     output(v2);
59 }
60 
61 // 测试2
62 // 对容器类对象指定迭代器区间进行赋值、计算最大值/最小值/均值
63 void test2() {
64     vector<int> v0(10);  
65     generate(v0.begin(), v0.end(), rand_int_100); 
66     cout << "v0: ";
67     output(v0);
68 
69     auto iter1 = min_element(v0.begin(), v0.end());
70     cout << "最小值: " << *iter1 << endl;
71 
72     auto iter2 = max_element(v0.begin(), v0.end());
73     cout << "最大值: " << *iter2 << endl;
74 
75     auto ans = minmax_element(v0.begin(), v0.end());
76     cout << "最小值: " << *(ans.first) << endl;
77     cout << "最大值: " << *(ans.second) << endl;
78     double avg1 = accumulate(v0.begin(), v0.end(), 0)/v0.size();
79     cout << "均值: " << fixed << setprecision(2) << avg1 << endl;
80 
81     cout << endl;
82 
83     vector<int> v1{v0};
84     cout << "v0: ";
85     output(v0);
86     sort(v1.begin(), v1.end());
87     double avg2 = accumulate(v1.begin()+1, v1.end()-1, 0)/(v1.size()-2);
88     cout << "去掉最大值、最小值之后,均值: " << avg2 << endl;
89 }
View Code

运行结果截图:

实验任务三:

源代码:

 1 #include <iostream>
 2 #include <string>
 3 #include <algorithm>
 4 
 5 bool is_palindrome(std::string s);
 6 
 7 int main() {
 8     using namespace std;
 9     string s;
10 
11     while(cin >> s)  // 多组输入,直到按下Ctrl+Z后结束测试
12         cout << boolalpha << is_palindrome(s) << endl;
13 }
14 
15 // 函数is_palindrom定义
16 bool is_palindrome(std::string s){
17     std::string s1=s;
18     reverse(s1.begin() ,s1.end() );
19     if(s1==s)
20     return true;
21     else
22     return false;
23 } 
View Code

运行结果截图

实验任务四

源代码:

 1 #include <iostream>
 2 #include <string>
 3 #include <algorithm>
 4 
 5 std::string dec2n(int x, int n = 2);
 6 
 7 int main() {
 8     using namespace std;
 9 
10     int x;
11     while(cin >> x) {
12         cout << "十进制: " << x << endl;
13         cout << "二进制: " << dec2n(x) << endl;
14         cout << "八进制: " << dec2n(x, 8) << endl;
15         cout << "十六进制: " << dec2n(x, 16) << endl << endl;
16     }
17 }
18 
19 // 函数dec2n定义
20 std::string dec2n(int x, int n){
21     std::string s="";
22     int r;
23     std::string s1{"0123456789ABCDFG"};
24     if(n==2||n==8){
25         do{
26             r=x%n;
27             x/=n;
28             char y=r+'0';        
29             s=s+y;
30         }while(x);
31         reverse(s.begin() ,s.end() );
32         return s;
33     }
34     else{
35         
36         do{
37             r=x%n;
38             x/=n;
39             char y=*(s1.begin()+r);
40             s+=y;
41         }while(x);
42         reverse(s.begin() ,s.end() );
43         return s;
44     }
45      
46 } 
View Code

运行结果截图:

实验任务五

源代码

 1 #include <iostream>
 2 #include <string>
 3 #include <iomanip>
 4 #include <numeric> 
 5 #include <time.h>
 6 using namespace std;
 7 
 8 int rand_int(){
 9     srand(time(NULL));
10     return rand()%10+1;
11 }
12 
13 char rand_char(){
14     string s{"+-*/"};
15     int t;
16     t=rand()%4;
17     return *(s.begin()+t);
18 } 
19 
20 void output(int x,char z,int y){
21     cout<<x<<" "<<z<<" "<<y<<" = ";
22 }
23 int main() {
24     int x,y,s,a,n,r;
25     double truel=0.0;
26     char z;
27     for(int i=0;i<10;i++){
28         x=rand_int();
29         y=rand_int();
30         z=rand_char();
31         if(z=='+'){
32             s=x+y;    
33             output(x,z,y);
34             cin>>a;
35             if(a==s)
36             truel++;
37         }
38         else if(z=='-'){
39             while(x<=y){
40                 x=rand_int();
41             }
42             s=x-y;
43             output(x,z,y);
44             cin>>a;
45             if(a==s)
46             truel++;
47         }
48         else if(z=='*'){
49             s=x*y;    
50             output(x,z,y);
51             cin>>a;
52             if(a==s)
53             truel++;
54         }
55         else if(z=='/'){
56             while(1){
57                 s=x/y;
58                 r=y*s;
59                 if(x==r)
60                 break;
61                 x=rand_int();
62             }
63              
64             output(x,z,y);
65             cin>>a;
66             if(a==s)
67             truel++;
68         }
69     }
70 
71     cout<<"正确率:"<<fixed<<setprecision(2)<<truel*10<<"%";
72     
73 }
View Code

运行结果截图

 

标签:begin,cout,int,c++,v0,v1,实验,include
From: https://www.cnblogs.com/hxqbbimoshuchou666/p/18459567

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