任务1：
源代码task1.cpp
1 #include<bits/stdc++.h> 2 using namespace std; 3 4 //模板函数声明 5 template<typename T> 6 void output(const T &c); 7 8 //普通函数声明 9 void test1(); 10 void test2(); 11 void test3(); 12 13 int main(){ 14 cout<<"测试1：\n"; 15 test1(); 16 17 cout<<"测试2：\n"; 18 test2(); 19 20 cout<<"测试3：\n"; 21 test3(); 22 23 } 24 25 //输出容器对象C中的元素 26 template <typename T> 27 void output(const T &c) 28 { 29 for(auto &i: c) 30 cout<<i<<" "; 31 cout<<endl; 32 } 33 34 void test1(){ 35 string s0{"0123456789"}; 36 cout<<"s0 = "<<s0<<endl; 37 38 string s1={s0}; 39 reverse(s1.begin(),s1.end()); //从头至尾反转元素 40 cout<<"s1 = "<<s1<<endl; 41 42 string s2={s0}; 43 reverse_copy(s0.begin(),s0.end(),s2.begin()); //从头至尾复制，从第0位开始反转 44 cout<<"s2 = "<<s2<<endl; 45 } 46 47 void test2(){ 48 vector<int> v0{2,0,4,9}; 49 cout<<"v0: "; 50 output(v0); 51 52 vector<int> v1{v0}; 53 reverse(v1.begin(),v1.end()); 54 cout<<"v1: "; 55 output(v1); 56 57 vector<int> v2{v0}; 58 reverse_copy(v0.begin(),v0.end(),v2.begin()); 59 cout<<"v2: "; 60 output(v2); 61 } 62 63 void test3(){ 64 vector <int> v0{0,1,2,3,4,5,6,7,8,9}; 65 cout<<"v0: "; 66 output(v0); 67 68 vector<int> v1{v0}; 69 rotate(v1.begin(),v1.begin()+1,v1.end()); 70 //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 71 cout<<"v1: "; 72 output(v1); 73 74 vector<int> v2{v0}; 75 rotate(v2.begin(),v2.begin()+2,v2.end()); 76 cout<<"v2: "; 77 output(v2); 78 79 vector<int> v3{v0}; 80 rotate(v3.begin(),v3.end()-1,v3.end()); 81 cout<<"v3: "; 82 output(v3); 83 84 vector<int> v4{v0}; 85 rotate(v4.begin(),v4.end()-2,v4.end()); 86 cout<<"v4: "; 87 output(v4); 88 89 }
运行结果截图：
任务2：
源代码task2.cpp
1 #include<bits/stdc++.h> 2 using namespace std; 3 4 template <typename T> 5 void output(const T &c); 6 7 int rand_int_100(); 8 void test1(); 9 void test2(); 10 11 int main() 12 { 13 cout<<"测试1：\n"; 14 test1(); 15 16 cout<<"测试2：\n"; 17 test2(); 18 19 } 20 21 template <typename T> 22 void output (const T &c){ 23 for(auto &i: c) 24 cout<<i<<" "; 25 cout<<endl; 26 27 } 28 29 int rand_int_100(){ 30 return rand()%101; 31 32 } 33 34 void test1(){ 35 vector<int> v0(10); 36 generate(v0.begin(),v0.end(),rand_int_100); 37 cout<<"v0: "; 38 output(v0); 39 40 vector<int> v1{v0}; 41 sort(v1.begin(),v1.end()); 42 cout<<"v1: "; 43 output(v1); 44 45 vector <int> v2{v0}; 46 sort(v2.begin()+1,v2.end()-1); 47 cout<<"v2: "; 48 output(v2); 49 } 50 51 void test2(){ 52 vector<int> v0(10); 53 generate(v0.begin(),v0.end(),rand_int_100); 54 cout<<"v0: "; 55 output(v0); 56 57 auto iter1=min_element(v0.begin(),v0.end()); 58 cout<<"最小值: "<<*iter1<<endl; 59 60 auto iter2=max_element(v0.begin(),v0.end()); 61 cout<<"最大值："<<*iter2<<endl; 62 63 auto ans=minmax_element(v0.begin(),v0.end()); 64 cout<<"最小值："<<*(ans.first)<<endl; 65 cout<<"最大值："<<*(ans.second)<<endl; 66 double avg1=accumulate(v0.begin(),v0.end(),0)/v0.size(); 67 cout<<"均值："<<fixed<<setprecision(2)<<avg1<<endl; 68 69 cout<<endl; 70 vector<int> v1{v0}; 71 cout<<"v0："; 72 output(v0); 73 sort(v1.begin(),v1.end()); 74 double avg2=accumulate(v1.begin()+1,v1.end()-1,0)/(v1.size()-2); 75 cout<<"去掉最大值、最小值之后，均值："<<avg2<<endl; 76 }
运行结果截图：
任务3：
源代码task3.cpp
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 int len=s.size(); 18 int t=0; 19 for(int i=0;i<len;i++) 20 { 21 if(s[i]!=s[len-1-i]) 22 t=1; 23 } 24 if(t==0) 25 return true; 26 else 27 return false; 28 }
运行结果截图：
任务4：
源代码task4.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 << "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 int t=0; 22 std::string ans; 23 do 24 { 25 t=x%n; 26 if(t>=0&&t<=9) 27 ans+=(t+'0'); 28 else 29 ans+=(t+'A'-10); 30 x/=n; 31 }while(x>0); 32 reverse(ans.begin(),ans.end()); 33 return ans; 34 }
运行结果截图：
任务5：
源代码task5.cpp
1 #include<bits/stdc++.h> 2 using namespace std; 3 int main() 4 { 5 string s1="abcdefghijklmnopqrstuvwxyz"; 6 string s2="ABCDEFGHIJKLNMOPQRSTUVWXYZ"; 7 cout<<" "; 8 for(int i=0;i<=26;i++) 9 cout<<setw(2)<<s1[i]; 10 cout<<endl; 11 for(int i=1;i<=26;i++) 12 { 13 cout<<setw(2)<<i; 14 for(int j=0;j<26;j++) 15 { 16 cout<<setw(2)<<s2[(j+i)%26]; 17 } 18 cout<<endl; 19 } 20 cout<<endl; 21 return 0; 22 }
运行结果截图：
任务6：
源代码tssk6.cpp
1 #include<bits/stdc++.h> 2 using namespace std; 3 int main(){ 4 srand((unsigned)time(NULL)); 5 int ans; 6 int a,b,c; 7 double sum=0; 8 char op; 9 for(int i=1;i<=10;i++){ 10 ans=0; 11 op="-+*/"[rand()%4]; 12 if(op=='*') 13 { 14 a=rand()%10+1; 15 b=rand()%10+1; 16 ans=a*b; 17 } 18 else if(op=='+') 19 { 20 a=rand()%10+1; 21 b=rand()%10+1; 22 ans=a+b; 23 } 24 else if(op=='-') 25 { 26 a=rand()%10+1; 27 b=rand()%10+1; 28 while(b>a) 29 b=rand()%10+1; 30 ans=a-b; 31 } 32 else 33 { 34 a=rand()%10+1; 35 b=rand()%10+1; 36 while(a%b!=0) 37 b=rand()%10+1; 38 ans=a/b; 39 } 40 cout<<a<<" "<<op<<" "<<b<<" = "; 41 cin>>c; 42 if(c==ans) 43 sum++; 44 } 45 printf("%.2lf%\n",sum*10); 46 return 0; 47 }
运行结果截图：
实验总结：
（1）reverse(s1.begin(),s1.end()); //从头至尾反转元素
reverse_copy(s0.begin(),s0.end(),s2.begin()); //从头至尾复制，从第0位开始反转
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
（2）srand((unsigned)time(NULL));
int x=rand()%10+1; //随机生成[1,10]的整数x
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