#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<<"测试1:\n";
test1();
cout<<"测试2:\n";
test2();
cout<<"测试3:\n";
test3();
return 0;
}
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);
}
#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <numeric>
#include <iomanip>
using namespace std;
// 函数声明
// 模板函数声明
template<typename T>
void output(const T &c);
// 普通函数声明
int rand_int_100();
void test1();
void test2();
int main()
{
cout << "测试1: \n";
test1();
cout << "\n测试2: \n";
test2();
}
template <typename T>
void output(const T &c)
{
for(auto &i: c)
cout << i << " ";
cout << endl;
}
// 返回[0, 100]区间内的一个随机整数
int rand_int_100() {
return rand() % 101;
}
// 测试1
// 对容器类对象指定迭代器区间进行赋值、排序
void test1() {
vector<int> v0(10); // 创建一个动态数组对象v0, 对象大小为10
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
cout << "v0: ";
output(v0);
vector<int> v1{v0};
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
cout << "v1: ";
output(v1);
vector<int> v2{v0};
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
cout << "v2: ";
output(v2);
}
// 测试2
// 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
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;
}
#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
bool is_palindrome(std::string s);
int main() {
using namespace std;
string s;
while(cin >> s) // 多组输入，直到按下Ctrl+Z后结束测试
cout << boolalpha << is_palindrome(s) << endl;
}
bool is_palindrome(std::string s)
{
int len=s.length();
string s1{s.begin(),s.begin()+len/2};
string s2{s.end()-len/2,s.end()};
reverse(s2.begin(),s2.end());
if (s1==s2)
return true;
return false;
}
#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
std::string dec2n(int x, int n = 2);
int main() {
int x;
while(cin >> x) {
cout << "十进制: " << x << endl;
cout << "二进制: " << dec2n(x) << endl;
cout << "八进制: " << dec2n(x, 8) << endl;
cout << "十六进制: " << dec2n(x, 16) << endl << endl;
}
}
string dec2n(int x,int n)
{
if (n==2)
{
string r;
while (x != 0) {
r += (x % 2 == 0 ? "0" : "1");
x /= 2;
}
return r;
}
else if(n==8)
{
string r;
string o[8]={"0","1","2","3","4","5","6","7"};
while (x != 0) {
r += o[x % 8];
x /= 8;
}
reverse(r.begin(),r.end());
return r;
}
else if(n==16)
{
string r;
string o[16]={"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"};
while (x != 0) {
r += o[x % 16];
x /= 16;
}
reverse(r.begin(),r.end());
return r;
}
}
#include <bits/stdc++.h>
using namespace std;
template<typename T>
void print(const T &c);
int main ()
{
cout<<" ";
vector<char> letter1{'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'};
print(letter1);
vector<char> letter2{'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<<setw(2)<<i;
rotate(letter2.begin(), letter2.begin()+1, letter2.end());
print(letter2);
}
}
template<typename T>
void print(const T &c)
{
for (auto &i:c)
cout<<setw(2)<<i;
cout<<endl;
}
#include<bits/stdc++.h>
using namespace std;
#define num 10
class Compute{
private:
int rand_int_10();
public:
int right_ans=0;
void add();
void subtract();
void multiply();
void except();
void Generate_equation(Compute compute);
};
int Compute::rand_int_10(){
return rand() % 11;
}
void Compute::add(){
int a=Compute::rand_int_10(),b=Compute::rand_int_10();
int ans=a+b,input;
string formula=to_string(a)+" + "+to_string(b)+" = ";
cout<<formula;
cin>>input;
if (input==ans)
right_ans+=1;
}
void Compute::subtract(){
int a=Compute::rand_int_10(),b=Compute::rand_int_10();
int ans=a-b,input;
while(ans<0)
{
a=Compute::rand_int_10(),b=Compute::rand_int_10();
ans=a-b;
}
string formula=to_string(a)+" - "+to_string(b)+" = ";
cout<<formula;
cin>>input;
if (input==ans)
right_ans+=1;
}
void Compute::multiply(){
int a=Compute::rand_int_10(),b=Compute::rand_int_10();
int ans=a*b,input;
string formula=to_string(a)+" * "+to_string(b)+" = ";
cout<<formula;
cin>>input;
if (input==ans)
right_ans+=1;
}
void Compute::except(){
int a=Compute::rand_int_10(),b=Compute::rand_int_10();
int input;
double ans=(double)a/b;
while(ans-int(ans)!=0)
{
a=Compute::rand_int_10(),b=Compute::rand_int_10();
ans=(double)a/b;
}
string formula=to_string(a)+" / "+to_string(b)+" = ";
cout<<formula;
cin>>input;
if (input==ans)
right_ans+=1;
}
void Compute::Generate_equation(Compute compute)
{
for (int i=1;i<=num;++i)
{
int No=rand() % 4;
switch (No)
{
case 0:compute.add();break;
case 1:compute.subtract();break;
case 2:compute.multiply();break;
case 3:compute.except();break;
}
}
cout<<"正确率:"<<fixed<<setprecision(2)<<double(compute.right_ans*100/num)<<"%"<<endl;
}
int main ()
{
srand((unsigned)time(NULL));
Compute compute;
compute.Generate_equation(compute);
return 0;
}
