#include <iostream> #include <string> #include <vector> #include <algorithm> using namespace std; template<typename T> void output(const T &c); void test1(); void test2(); void test3(); int main() { cout << "測試1: \n"; test1(); cout << "\n測試2: \n"; test2(); cout << "\n測試3: \n"; test3(); } template <typename T> void output(const T &c) { for(auto &i: c) cout << i << " "; cout << endl; } void test1() { string s0{"0123456789"}; cout << "s0 = " << s0 << endl; string s1{s0}; reverse(s1.begin(), s1.end()); cout << "s1 = " << s1 << endl; string s2{s0}; reverse_copy(s0.begin(), s0.end(), s2.begin()); cout << "s2 = " << s2 << endl; } void test2() { vector<int> v0{2, 0, 4, 9}; cout << "v0: "; output(v0); vector<int> v1{v0}; reverse(v1.begin(), v1.end()); cout << "v1: "; output(v1); vector<int> v2{v0}; reverse_copy(v0.begin(), v0.end(), v2.begin()); cout << "v2: "; output(v2); } void test3() { vector<int> v0{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; cout << "v0: "; output(v0); vector<int> v1{v0}; rotate(v1.begin(), v1.begin()+1, v1.end()); cout << "v1: "; output(v1); vector<int> v2{v0}; rotate(v2.begin(), v2.begin()+2, v2.end()); cout << "v2: "; output(v2); vector<int> v3{v0}; rotate(v3.begin(), v3.end()-1, v3.end()); cout << "v3: "; output(v3); vector<int> v4{v0}; rotate(v4.begin(), v4.end()-2, v4.end()); cout << "v4: "; output(v4); }
任務2：
#include <iostream> #include <vector> #include <string> #include <algorithm> #include <numeric> #include <iomanip> using namespace std; template<typename T> void output(const T &c); int rand_int_100(); void test1(); void test2(); int main() { cout << "測試1: \n"; test1(); cout << "\n測試2: \n"; test2(); } template <typename T> void output(const T &c) { for(auto &i: c) cout << i << " "; cout << endl; } int rand_int_100() { return rand() % 101; } void test1() { vector<int> v0(10); generate(v0.begin(), v0.end(), rand_int_100); cout << "v0: "; output(v0); vector<int> v1{v0}; sort(v1.begin(), v1.end()); cout << "v1: "; output(v1); vector<int> v2{v0}; sort(v2.begin()+1, v2.end()-1); cout << "v2: "; output(v2); } void test2() { vector<int> v0(10); generate(v0.begin(), v0.end(), rand_int_100); cout << "v0: "; output(v0); auto iter1 = min_element(v0.begin(), v0.end()); cout << "最小值: " << *iter1 << endl; auto iter2 = max_element(v0.begin(), v0.end()); cout << "最大值: " << *iter2 << endl; auto ans = minmax_element(v0.begin(), v0.end()); cout << "最小值: " << *(ans.first) << endl; cout << "最大值: " << *(ans.second) << endl; double avg1 = accumulate(v0.begin(), v0.end(), 0)/v0.size(); cout << "均值: " << fixed << setprecision(2) << avg1 << endl; cout << endl; vector<int> v1{v0}; cout << "v0: "; output(v0); sort(v1.begin(), v1.end()); double avg2 = accumulate(v1.begin()+1, v1.end()-1, 0)/(v1.size()-2); cout << "去掉最大值、最小值之後，均值: " << avg2 << endl; }
任務3：
#include <iostream> #include <string> #include <algorithm> bool is_palindrome(std::string s); int main() { using namespace std; string s; while(cin >> s) cout << boolalpha << is_palindrome(s) << endl; } bool is_palindrome(std::string s) { int i,j; int flog=0; for(i=0,j=s.size()-1;i<=j;i++,j--) { if(s[i]==s[j]) flog=1; else break; } if(flog==1) return true; else return false; }
任務截圖：
任務4：
#include <iostream> #include <string> #include <algorithm> std::string dec2n(int x, int n = 2); int main() { using namespace std; int x; while(cin >> x) { cout << "十進位制: " << x << endl; cout << "二進位制: " << dec2n(x) << endl; cout << "八進位制: " << dec2n(x, 8) << endl; cout << "十六進位制: " << dec2n(x, 16) << endl << endl; } } std::string dec2n(int x, int n) { std::string s; int k=x; while(k) { int i; i=k%n; if(i>=10) { switch(i) { case 10: s+='A';break; case 11: s+='B';break; case 12: s+='C';break; case 13: s+='D';break; case 14: s+='E';break; case 15: s+='F';break; } } else s+=i+'0'; k/=n; } reverse(s.begin(),s.end()); return s; }
執行結果：
任務5：
#include<iostream> #include <string> #include <vector> #include <algorithm> using namespace std; template<typename T> void output(const T &c); template <typename T> void output(const T &c) { for(auto &i: c) cout << i << " "; cout << endl; } int main() { cout << " " ; cout<<"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"<<endl; vector<char> v1{'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'}; for(int i=1;i<=26;i++) { cout<<i<<" "; rotate(v1.begin(), v1.begin()+1, v1.end()); output(v1); } }
執行結果：
任務6：
#include<iostream> #include<vector> #include<string> #include<algorithm> #include <numeric> #include<iomanip> #include<cstdlib> #include<ctime> using namespace std; int main() { int i; double sum=0; for(i=1;i<11;i++) { srand((unsigned)time(NULL)); int a,b,c,d,e; a=rand()%10+1; b=rand()%10+1; c=rand()%4+1; switch(c) { case 1: cout<< a<<"+"<<b<<"="; d=a+b;break; case 2: if(a<b) { e=a; a=b; b=e; } cout<< a<<"-"<<b<<"="; d=a-b;break; case 3: cout<< a<<"*"<<b<<"="; d=a*b;break; case 4: while(a/b==0||a%b!=0) { a=rand()%10+1; b=rand()%10+1; } cout<< a<<"/"<<b<<"="; d=a/b;break; } int num; cin>>num; if(num==d) sum+=10; } cout<<"正確率:"; cout<<fixed<<setprecision(2)<<sum<<"%"<<endl; }
任務截圖
