#include <iostream>
#include <vector>
#include <string>
int main(int argc, const char * argv[]) {
// insert code here...
std::cout << "Hello, World! ";
int a=0;
std::cout <<(a==0?"a==0":"a!=0");
int b[10] = {10,3,3,3};
std::vector<int> c;
c.push_back(10);
c.push_back(40);
c.push_back(33);
int d=c[0];
int e=c[1];
int f=c[2];
std::cout<<d<<std::endl;
std::cout<<e<<std::endl;
std::cout<<f<<std::endl;
std::cout<<c.size()<<std::endl;
for (int i=0; i<c.size();i++) {
std::cout<<c[i]<<std::endl;
}
char str[128]="Hello World";
char *p="Hello World";
std::string s;
s="232sdsafdas912::";
s+="dsadsad[[";
return 0;
}
#include <iostream>
int main(int argc, const char * argv[]) {
int max(int x,int y);
int a,b,c;
std::cout<<"输入两个数字"<<std::endl;
std::cin>>a>>b;
c=max(a, b);
std::cout<<c;
}
int max(int x,int y){
int z;
if(x>y) z=x;
else z=y;
return z;
}
#include <iostream>
using namespace std;
class Student{
private:
int num;
int score;
public:
void setdata(){
cin>>num;
cin>>score;
}
void display(){
cout<<"num="<<num<<endl;
cout<<"score="<<score<<endl;
}
};
Student s1,s2;
int main(int argc, const char * argv[]) {
s1.setdata();
s1.display();
s2.setdata();
s2.display();
}
#include <iostream>
using namespace std;
class Complex{
public:
Complex(){real=0;imag=0;}
Complex(double r,double i){real=r;imag=i;}
Complex operator + (Complex &c2);
void display();
private:
double real;
double imag;
};
Complex Complex::operator+(Complex &c2){
Complex c;
c.real=real+c2.real;
c.imag=imag+c2.imag;
return c;
}
void Complex::display(){
cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
int main(int argc, const char * argv[]) {
Complex c1(3,4),c2(5,-10),c3;
c3=c1+c2;
cout<<"c1=";
c1.display();
cout<<"c2=";
c2.display();
cout<<"c1+c2=";
c3.display();
return 0;
}
#include <iostream>
#include <fstream>
using namespace std;
int main(int argc, const char * argv[]) {
int a[10];
ofstream outfile("f1.txt",ios::out);
if(! outfile){
cerr<<"open error!"<<endl;
exit(1);
}
cout<<"enter 10 integer numbers:"<<endl;
for (int i=0;i<10;i++) {
cin>>a[i];
outfile<<a[i]<<" ";
}
outfile.close();
return 0;
}