c++ programming - 1st study
TRANSCRIPT
3
#include <stdio.h>
int main(){
printf("Hello, World!");
return 0;}
#include <iostream>
int main(){
std::cout << "Hello, World";
return 0;}
C C++
4
#include <stdio.h>
int main(){
int x = 10, y = 20;
printf("x = %d, y = %d\n", x, y);
return 0;}
#include <iostream>
int main(){
int x = 10, y = 20;
std::cout << "x = " << x<< ", y = " << y << std::endl;
return 0;}
C C++
5
#include <stdio.h>
int main(){
int x = 0;
printf("Input the number: ");scanf("%d", &x);
printf("x = %d\n", x);
return 0;}
#include <iostream>
int main(){
int x = 0;
std::cout << "Input the number:";std::cin >> x;
std::cout << "x = " << x<< std::endl;
return 0;}
C C++
6
8
#include <stdio.h>
int main(){
int i = 1;
if (i)printf("i is true!\n");
elseprintf("i is false!\n");
return 0;}
#include <iostream>
int main(){
bool b = true;
if (b)std::cout << "b is true!"
<< std::endl;else
std::cout << "b is false!"<< std::endl;
return 0;}
C C++
9
#include <iostream>
int main(){
bool b = true;
std::cout << b << std::endl;std::cout << !b << std::endl;
return 0;}
10
#include <iostream>
int main(){
bool b = true;
std::cout.setf(std::ios::boolalpha);std::cout << b << std::endl;std::cout << !b << std::endl;
std::cout.unsetf(std::ios::boolalpha);std::cout << b << std::endl;std::cout << !b << std::endl;
return 0;}
11
13
#include <iostream>
int main(){
int i1 = 10;double d1 = 3.14;
return 0;}
#include <iostream>
int main(){
auto i2 = 10;auto d2 = 3.14;
return 0;}
C++98 C++11
14
#include <iostream>#include <vector>#include <string>#include <tuple>
int main(){
std::vector<std::tuple<std::string, int, double>> vStudents;
for (std::vector<std::tuple<std::string, int, double>>::iterator iter =vStudents.begin(); iter != vStudents.end(); ++iter) { … }
return 0;}
C++98
15
#include <iostream>#include <vector>#include <string>#include <tuple>
int main(){
std::vector<std::tuple<std::string, int, double>> vStudents;
for (auto iter = vStudents.begin(); iter != vStudents.end(); ++iter) { … }
return 0;}
C++11
16