程序实际实验1实验报告
实验任务1
1 #include <iostream> 2 #include <string> 3 #include <vector> 4 #include <algorithm> 5 6 using namespace std; 7 8 template<typename T> 9 void output(const T &c); 10 11 void test1(); 12 void test2(); 13 void test3(); 14 15 int main() { 16 cout << "测试1: \n"; 17 test1(); 18 19 cout << "\n测试2: \n"; 20 test2(); 21 22 cout << "\n测试3: \n"; 23 test3(); 24 } 25 26 template <typename T> 27 void output(const T &c) { 28 for(auto &i: c) 29 cout << i << " "; 30 cout << endl; 31 } 32 33 void test1() { 34 string s0{"0123456789"}; 35 cout << "s0 = " << s0 << endl; 36 37 string s1{s0}; 38 reverse(s1.begin(), s1.end()); 39 cout << "s1 = " << s1 << endl; 40 41 string s2{s0}; 42 reverse_copy(s0.begin(), s0.end(), s2.begin()); 43 cout << "s2 = " << s2 << endl; 44 } 45 46 void test2() { 47 vector<int> v0{2, 0, 4, 9}; 48 cout << "v0: "; 49 output(v0); 50 51 vector<int> v1{v0}; 52 reverse(v1.begin(), v1.end()); 53 cout << "v1: "; 54 output(v1); 55 56 vector<int> v2{v0}; 57 reverse_copy(v0.begin(), v0.end(), v2.begin()); 58 cout << "v2: "; 59 output(v2); 60 } 61 62 void test3() { 63 vector<int> v0{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; 64 cout << "v0: "; 65 output(v0); 66 67 vector<int> v1{v0}; 68 rotate(v1.begin(), v1.begin()+1, v1.end()); 69 cout << "v1: "; 70 output(v1); 71 72 vector<int> v2{v0}; 73 rotate(v2.begin(), v2.begin()+2, v2.end()); 74 cout << "v2: "; 75 output(v2); 76 77 vector<int> v3{v0}; 78 rotate(v3.begin(), v3.end()-1, v3.end()); 79 cout << "v3: "; 80 output(v3); 81 82 vector<int> v4{v0}; 83 rotate(v4.begin(), v4.end()-2, v4.end()); 84 cout << "v4: "; 85 output(v4); 86 }
运行结果1
实验任务2
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 template<typename T> 11 void output(const T &c); 12 13 int rand_int_100(); 14 void test1(); 15 void test2(); 16 17 int main() { 18 cout << "测试1: \n"; 19 test1(); 20 21 cout << "\n测试2: \n"; 22 test2(); 23 } 24 25 template <typename T> 26 void output(const T &c) { 27 for(auto &i: c) 28 cout << i << " "; 29 cout << endl; 30 } 31 32 int rand_int_100() { 33 return rand() % 101; 34 } 35 36 void test1() { 37 vector<int> v0(10); 38 generate(v0.begin(), v0.end(), rand_int_100); 39 cout << "v0: "; 40 output(v0); 41 42 vector<int> v1{v0}; 43 sort(v1.begin(), v1.end()); 44 cout << "v1: "; 45 output(v1); 46 47 vector<int> v2{v0}; 48 sort(v2.begin()+1, v2.end()-1); 49 cout << "v2: "; 50 output(v2); 51 } 52 53 void test2() { 54 vector<int> v0(10); 55 generate(v0.begin(), v0.end(), rand_int_100); 56 cout << "v0: "; 57 output(v0); 58 59 auto iter1 = min_element(v0.begin(), v0.end()); 60 cout << "最小值: " << *iter1 << endl; 61 62 auto iter2 = max_element(v0.begin(), v0.end()); 63 cout << "最大值: " << *iter2 << endl; 64 65 auto ans = minmax_element(v0.begin(), v0.end()); 66 cout << "最小值: " << *(ans.first) << endl; 67 cout << "最大值: " << *(ans.second) << endl; 68 double avg1 = accumulate(v0.begin(), v0.end(), 0)/v0.size(); 69 cout << "均值: " << fixed << setprecision(2) << avg1 << endl; 70 71 cout << endl; 72 73 vector<int> v1{v0}; 74 cout << "v0: "; 75 output(v0); 76 sort(v1.begin(), v1.end()); 77 double avg2 = accumulate(v1.begin()+1, v1.end()-1, 0)/(v1.size()-2); 78 cout << "去掉最大值、最小值之后，均值: " << avg2 << endl; 79 }
运行结果2
实验任务3
1 #include <iostream> 2 #include <string> 3 #include <algorithm> 4 using namespace std; 5 bool is_palindrome(string s); 6 7 int main() { 8 string s; 9 10 while(cin >> s) // 多组输入，直到按下Ctrl+Z后结束测试 11 cout << boolalpha << is_palindrome(s) << endl; 12 } 13 14 bool is_palindrome(string s) 15 { 16 string s1=s; 17 reverse(s1.begin(),s1.end()); 18 if(s==s1) 19 return true; 20 return false; 21 }
运行结果3
实验任务4
1 #include <iostream> 2 #include <string> 3 #include <algorithm> 4 std::string dec2n(int x, int n=2); 5 6 int main() { 7 using namespace std; 8 9 int x; 10 while(cin >> x) { 11 cout << "十进制: " << x << endl; 12 cout << "二进制: " << dec2n(x) << endl; 13 cout << "八进制: " << dec2n(x, 8) << endl; 14 cout << "十六进制: " << dec2n(x, 16) << endl << endl; 15 } 16 } 17 18 // 函数dec2n定义 19 // 待补足 20 // ××× 21 std::string dec2n(int x,int n) 22 { 23 switch(n) 24 { 25 char s[100]; 26 case 2:itoa(x,s,2);return s;break; 27 case 8:itoa(x,s,8);return s;break; 28 case 16:itoa(x,s,16);return s;break; 29 } 30 }
运行结果4
实验任务5
1 #include<iostream> 2 #include<vector> 3 #include<string> 4 #include<algorithm> 5 #include<iomanip> 6 using namespace std; 7 8 int main() 9 { 10 cout<<setw(4); 11 string a="abcdefghijklmnopqrstuvwxyz"; 12 string b="ABCDEFGHIJKLMNOPQRSTUVWXYZ"; 13 for(int i=0;i<26;i++) 14 { 15 cout<<a[i]<<setw(2); 16 } 17 cout<<endl; 18 for(int i=1;i<=26;i++) 19 { 20 cout<<i<<setw(2); 21 for(int j=1;j<=26;j++) 22 { 23 cout<<b[(i+j-1)%26]<<setw(2); 24 } 25 cout<<endl; 26 } 27 return 0; 28 }
实验结果5
实验任务6
1 #include<iostream> 2 #include<cstdlib> 3 #include<string> 4 #include <algorithm> 5 #include <cmath> 6 #include <ctime> 7 #include <iomanip> 8 using namespace std; 9 int main() 10 { 11 srand(time(0)); 12 const int Question=10; 13 int Answer=0; 14 int accuracy; 15 for(int i=0;i<Question;i++) 16 { 17 char operators[]={'+','-','*','/'}; 18 char op=operators[rand()%4]; 19 int num1=rand()%10+1; 20 int num2=rand()%10+1; 21 if(op=='-'){ 22 while(num1<=num2) 23 { 24 num1=rand()%10+1; 25 num2=rand()%10+1; 26 } 27 } 28 else if(op=='/') 29 { 30 while(num1%num2!=0) 31 { 32 num1=rand()%10+1; 33 num2=rand()%(num1/2)+1; 34 } 35 } 36 int ans1; 37 switch(op) 38 { 39 case '+':ans1=num1+num2;break; 40 case '-':ans1=num1-num2;break; 41 case '*':ans1=num1*num2;break; 42 case '/':ans1=num1/num2;break; 43 } 44 cout << num1 << " " << op << " " << num2 << " = "; 45 int ans2; 46 cin>>ans2; 47 48 if(ans1==ans2) 49 { 50 accuracy++; 51 } 52 53 54 } 55 cout<<"正确率："<<((double)accuracy/Question)*100<<"%"<<endl; 56 57 58 return 0; 59 }
运行结果6
