#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
标签：begin,end,cout,int,C++,v0,实验,include From： https://www.cnblogs.com/xy1101/p/18453551