test1：
源代码：
1 #include<iostream>
2 #include<string>
3 #include<vector>
4 #include<algorithm>
5 using namespace std;
6 template<typename T>
7 void output(const T &c);
8 void test1();
9 void test2();
10 void test3();
11 int main(){
12 cout<<"测试1:\n";
13 test1();
14 cout<<"\n测试2:\n";
15 test2();
16 cout<<"\n测试3:\n";
17 test3();
18 }
19 template<typename T>
20 void output(const T&c){
21 for(auto &i:c)
22 cout<<i<<" ";
23 cout<<endl;
24 }
25 void test1(){
26 string s0{"0123456789"};
27 cout<<"s0="<<s0<<endl;
28 string s1{s0};
29 reverse(s1.begin(),s1.end());
30 cout<<"s1="<<s1<<endl;
31 string s2{s0};
32 reverse_copy(s0.begin(),s0.end(),s2.begin());
33 cout<<"s2="<<s2<<endl;
34 }
35 void test2(){
36 vector<int> v0{2,0,4,9};
37 cout<<"v0:";
38 output(v0);
39 vector<int> v1{v0};
40 reverse(v1.begin(),v1.end());
41 cout<<"v1:";
42 output(v1);
43 vector<int> v2{v0};
44 reverse_copy(v0.begin(),v0.end(),v2.begin());
45 cout<<"v2:";
46 }
47 void test3(){
48 vector<int>v0{0,1,2,3,4,5,6,7,8,9};
49 cout<<"v0:";
50 output(v0);
51 vector<int>v1{v0};
52 rotate(v1.begin(),v1.begin()+1,v1.end());
53 cout<<"v1:";
54 output(v1);
55 vector<int>v2{v0};
56 rotate(v2.begin(),v2.begin()+2,v2.end());
57 cout<<"v2:";
58 output(v2);
59 vector<int>v3{v0};
60 rotate(v3.begin(),v3.end()-1,v3.end());
61 cout<<"v3:";
62 output(v3);
63 vector<int>v4{v0};
64 rotate(v4.begin(),v4.end()-1,v4.end());
65 cout<<"v4:";
66 output(v4);
67
68 }
运行截图：
test2：
源代码：
1 #include<iostream>
2 #include<vector>
3 #include<string>
4 #include<algorithm>
5 #include<numeric>
6 #include<iomanip>
7 using namespace std;
8 template<typename T>
9 void output(const T&c);
10 int rand_int_100();
11 void test1();
12 void test2();
13 int main(){
14 cout<<"测试1：\n";
15 test1();
16 cout<<"\n测试2:\n";
17 test2();
18 }
19 template <typename T>
20 void output(const T &c){
21 for(auto &i:c)
22 cout<<i<<" ";
23 cout<<endl;
24 }
25 int rand_int_100(){
26 return rand()%101;
27 }
28 void test1(){
29 vector<int>v0(10);
30 generate(v0.begin() ,v0.end() ,rand_int_100);
31 cout<<"v0: ";
32 output(v0);
33 vector<int>v1{v0};
34 sort(v1.begin(),v1.end());
35 cout<<"v1: ";
36 output(v1);
37 vector<int>v2{v0};
38 sort(v2.begin()+1,v2.end()-1);
39 cout<<"v2: ";
40 output(v2);
41 }
42 void test2(){
43 vector<int>v0(10);
44 generate(v0.begin(),v0.end(),rand_int_100);
45 cout<<"v0: ";
46 output(v0);
47 auto iterl=min_element(v0.begin() ,v0.end() );
48 cout<<"最小值: "<<*iterl<<endl;
49 auto iter2=max_element(v0.begin(),v0.end());
50 cout<<"最大值："<<*iter2<<endl;
51 auto ans=minmax_element(v0.begin(),v0.end());
52 cout<<"最小值："<<*(ans.first)<<endl;
53 cout<<"最大值："<<*(ans.second)<<endl;
54 double avg1=accumulate(v0.begin(),v0.end(),0)/v0.size() ;
55 cout<<"均值："<<fixed<<setprecision(2)<<avg1<<endl;
56 cout<<endl;
57 vector<int>v1{v0};
58 cout<<"v0: ";
59 output(v0);
60 sort(v1.begin(),v1.end());
61 double avg2=accumulate(v1.begin()+1,v1.end()-1,0)/(v1.size()-2);
62 cout<<"去掉最大值、最小值之后，均值："<<avg2<<endl;
63 }
运行截图：
test3：
源代码：
1 #include <iostream>
2 #include <string>
3 #include <algorithm>
4 bool is_palindrome(std::string s);
5 int main() {
6 using namespace std;
7 string s;
8 while(cin >> s)
9 cout << boolalpha << is_palindrome(s) << endl;
10 }
11 bool is_palindrome(std::string s){
12 std::string a{s};
13 reverse(a.begin(),a.end());
14 if(a==s)
15 return 1;
16 if(a!=s)
17 return 0;
18 }
运行截图：
test4：
源代码：
1 #include <iostream>
2 #include <string>
3 #include <algorithm>
4 std::string dec2n(int x, int n = 2);
5 int main() {
6 using namespace std;
7 int x;
8 while(cin >> x) {
9 cout << "十进制: " << x << endl;
10 cout << "二进制: " << dec2n(x) << endl;
11 cout << "八进制: " << dec2n(x, 8) << endl;
12 cout << "十六进制: " << dec2n(x, 16) << endl << endl;
13 }
14 }
15 std::string dec2n(int x, int n) {
16 std::string s;
17 switch(n){
18 char a[100];
19 case 2:itoa(x,a,2);return a;break;
20 case 8:itoa(x,a,8);return a;break;
21 case 16:itoa(x,a,16);return a;break;
22 }
23 }
View Code
运行截图：
test5：
源代码：
1 #include<iostream>
2 #include<string>
3 #include<vector>
4 #include<algorithm>
5 #include<iomanip>
6 using namespace std;
7 template<class T>
8 void output(const T& c);
9 int main(){
10 cout<<" ";
11 for(int i=97;i<=122;i++)
12 cout<<static_cast<char>(i)<<" ";
13 cout<<endl;
14 vector<char> v0{'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
15 for(int i=1;i<=26;i++){
16 vector<char> v1{v0};
17 rotate(v1.begin(),v1.begin()+i,v1.end());
18 cout<<setw(2)<<i<<" ";
19 output(v1) ;
20 }
21 }
22 template<class T>
23 void output(const T& c){
24 for(auto &i:c){
25 cout<<i<<" ";
26 }
27 cout<<endl;
28 }
View Code
运行截图:
test6：
源代码：
1 #include <iostream>
2 #include <cstdlib>
3 #include <ctime>
4
5 using namespace std;
6
7 int main() {
8 int m=0;
9 for(int i=0;i<10;i++){
10 srand(time(0));
11 char op = "+-*/"[rand() % 4];
12 int w = 0;
13 int a;
14 int b;
15 int c;
16 switch (op) {
17 case '+':
18 a = rand() % 10+1; // 生成一个1到9之间的随机整数
19 b = rand() % 10+1 ;
20 w = a + b; break;
21 case '-':
22 a = rand() % 10+1; // 生成一个1到9之间的随机整数
23 b = rand() % a+1 ;
24 w=a-b; break;
25 case '*':w=a*b; break;
26 case '/':
27 a= rand() % 10+1; // 生成一个1到9之间的随机整数
28 for(int i=2;i<=a;i++){
29 b=i;
30 for(int j=1;j<=10;j++){
31 c=j;
32 if(b*c==a){
33 w=a/b;break;
34 }
35 }
36 }
37 }
38 cout << a << ' ' << op << ' ' << b << '=' ;
39 int user_answer = 0;
40 cin >> user_answer;
41 cout<<endl;
42 if (user_answer == w) {
43 m++;
44 }
45 }
46 cout<<"正确率:"<<m*10<<"%"<<endl;
47 return 0;
48 }
View Code
运行截图：
实验总结：
对于本次六个实验对于第六个实验的印象最为深刻；在生成随机数时，加法和乘法对于数字a,b,的要求较低，但在减法和除法时特别是除法要求较高；
这里我采用了对生成随机数的进一步缩减，完成减法的要求，采用循环for的方法，完成除法要求。
此外对于实验三同样有较深的印象，因为较上学期的回文数的判断，采用本学期所学会简便许多。
标签：begin,初体验,end,cout,int,编程,c++,v0,include From： https://www.cnblogs.com/nofear77/p/18453569