实验1 C++

#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 << "\n测试2: \n";
    test2();

    cout << "\n测试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);
}

 任务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 << "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;
}


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、最小值之后，均值: " << avg2 << endl;
}

 任务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;
}

任务截图：

 任务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;
    }
}
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;
}

运行结果：

 任务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);
        
    }
    
}

运行结果：

 任务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<<"正确率:";
    cout<<fixed<<setprecision(2)<<sum<<"%"<<endl;
      
}

 

 

任务截图