实验1：
task.cpp
1 #include <iostream>
2 #include <string>
3 #include <vector>
4 #include <algorithm>
5 using namespace std;
6
7 template<typename T>
8 void output(const T &c);
9
10 void test1();
11 void test2();
12 void test3();
13 int main() {
14 cout << "测试1: \n";
15 test1();
16 cout << "\n测试2: \n";
17 test2();
18 cout << "\n测试3: \n";
19 test3();
20 }
21
22 template <typename T>
23 void output(const T &c) {
24 for(auto &i: c)
25 cout << i << " ";
26 cout << endl;
27 }
28
29 void test1() {
30 string s0{"0123456789"};
31 cout << "s0 = " << s0 << endl;
32 string s1{s0};
33 reverse(s1.begin(), s1.end());
34 cout << "s1 = " << s1 << endl;
35 string s2{s0};
36 reverse_copy(s0.begin(), s0.end(), s2.begin());
37
38 cout << "s2 = " << s2 << endl;
39 }
40
41 void test2() {
42 vector<int> v0{2, 0, 4, 9};
43 cout << "v0: ";
44 output(v0);
45 vector<int> v1{v0};
46 reverse(v1.begin(), v1.end());
47 cout << "v1: ";
48 output(v1);
49 vector<int> v2{v0};
50 reverse_copy(v0.begin(), v0.end(), v2.begin());
51 cout << "v2: ";
52 output(v2);
53 }
54
55 void test3() {
56 vector<int> v0{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
57 cout << "v0: ";
58 output(v0);
59 vector<int> v1{v0};
60 rotate(v1.begin(), v1.begin()+1, v1.end());
61 cout << "v1: ";
62 output(v1);
63 vector<int> v2{v0};
64 rotate(v2.begin(), v2.begin()+2, v2.end());
65 cout << "v2: ";
66 output(v2);
67 vector<int> v3{v0};
68 rotate(v3.begin(), v3.end()-1, v3.end());
69 cout << "v3: ";
70 output(v3);
71 vector<int> v4{v0};
72 rotate(v4.begin(), v4.end()-2, v4.end());
73 cout << "v4: ";
74 output(v4);
75 }
运行结果测试截图
实验2
task.cpp
1 #include <iostream>
2 #include <vector>
3 #include <string>
4 #include <algorithm>
5 #include <numeric>
6 #include <iomanip>
7 using namespace std;
8 // 函数声明
9 // 模板函数声明
10 template<typename T>
11 void output(const T &c);
12 // 普通函数声明
13 int rand_int_100();
14 void test1();
15 void test2();
16 int main() {
17 cout << "测试1: \n";
18 test1();
19 cout << "\n测试2: \n";
20 test2();
21 }
22 // 函数实现
23 // 输出容器对象c中的元素
24 template <typename T>
25 void output(const T &c) {
26 for(auto &i: c)
27 cout << i << " ";
28 cout << endl;
29 }
30 // 返回[0, 100]区间内的一个随机整数
31 int rand_int_100() {
32 return rand() % 101;
33 }
34 // 测试1
35 // 对容器类对象指定迭代器区间进行赋值、排序
36 void test1() {
37 vector<int> v0(10); // 创建一个动态数组对象v0, 对象大小为10
38 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
39 cout << "v0: ";
40 output(v0);
41 vector<int> v1{v0};
42 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
43 cout << "v1: ";
44 output(v1);
45 vector<int> v2{v0};
46 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
47 cout << "v2: ";
48 output(v2);
49 }
50 // 测试2
51 // 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
52 void test2() {
53 vector<int> v0(10);
54 generate(v0.begin(), v0.end(), rand_int_100);
55 cout << "v0: ";
56 output(v0);
57 auto iter1 = min_element(v0.begin(), v0.end());
58 cout << "最小值: " << *iter1 << endl;
59 auto iter2 = max_element(v0.begin(), v0.end());
60 cout << "最大值: " << *iter2 << endl;
61 auto ans = minmax_element(v0.begin(), v0.end());
62 cout << "最小值: " << *(ans.first) << endl;
63 cout << "最大值: " << *(ans.second) << endl;
64 double avg1 = accumulate(v0.begin(), v0.end(), 0)/v0.size();
65 cout << "均值: " << fixed << setprecision(2) << avg1 << endl;
66 cout << endl;
67 vector<int> v1{v0};
68 cout << "v0: ";
69 output(v0);
70 sort(v1.begin(), v1.end());
71 double avg2 = accumulate(v1.begin()+1, v1.end()-1,0)/(v1.size()-2);
72 cout << "去掉最大值、最小值之后，均值: " << avg2 << endl;
73 }
运行结果测试截图
实验3
task.cpp
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) // 多组输入，直到按下Ctrl+Z后结束测试
9 cout << boolalpha << is_palindrome(s) << endl;
10 }
11
12 bool is_palindrome(std::string s)
13 {
14 std::string s_{s};
15 reverse(s.begin(),s.end());
16 if(s_==s) return true;
17 return false;
18 }
运行结果测试截图
实验4
task.cpp
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 << "Ê®½øÖÆ: " << x << endl;
13 cout << "¶þ½øÖÆ: " << dec2n(x) << endl;
14 cout << "°Ë½øÖÆ: " << dec2n(x, 8) << endl;
15 cout << "Ê®Áù½øÖÆ: " << dec2n(x, 16) << endl << endl;
16 }
17 }
18
19 std::string dec2n(int x,int n)
20 {
21 char res[10000]={};
22 itoa(x,res,n);
23 std::string s;
24 for(auto &i:res) s+=i;
25 return s;
26 }
运行结果测试
实验5
task.cpp
1 #include <iostream>
2 #include <iomanip>
3
4 using namespace std;
5 int main()
6 {
7 cout<<setw(2)<<" ";
8 for(int i=1;i<27;i++) cout<<setw(2)<<char(96+i);
9 int l=0,cnt=64;
10 while(l<26){
11 l++;
12 cnt++;
13 cout<<endl<<setw(2)<<l;
14 for(int i=1;i<27;i++) {
15 cnt++;
16 if(cnt>90) cnt-=26;
17 cout<<setw(2)<<char(cnt);
18 }
19 }
20 return 0;
21 }
运行结果测试
实验6
task.cpp
1 #include <iostream>
2 #include <stdlib.h>
3 #include <time.h>
4 #include <iomanip>
5
6 using namespace std;
7
8 int comp(char opra,int a,int b){
9 if(opra == '+') return a+b;
10 else if (opra == '-') return a-b;
11 else if (opra == '*') return a*b;
12 else return a/b;
13 }
14
15 int main()
16 {
17
18 char sym[4]={'+','-','*','/'};
19 int curr = 0;
20 for(int i=0;i<10;i++){
21 srand(time(0));
22 char opra = sym[rand()%4];
23 int a,b;
24 if(opra == '-'){
25 a = rand()%9+2;
26 b = rand()%(a-1)+1;
27 }
28 else if(opra == '/'){
29 b = rand()%10+1;
30 a = b*(rand()%10/b+1);
31 }
32 else a = rand()%10+1,b=rand()%10+1;
33 cout<<a<<" "<<opra<<" "<<b<<" = ";
34 int ans;
35 cin>>ans;
36 if(ans == comp(opra,a,b)) curr++;
37 }
38 cout<<"ÕýÈ·ÂÊ£º"<<1.0*curr/10*100<<setprecision(2)<<"%";
39 return 0;
40
41
42 }
运行结果测试
标签：begin,初体验,end,cout,int,编程,C++,v0,include From： https://www.cnblogs.com/snoozy/p/18453479