C++ :

//变量实验1.cpp
#include <iostream>
using namespace std;
int main ()
{
  int a;
  int b;
  int result;

  a = 5;
  b = 2;
  a = a + 1;
  result = a - b;

  cout<<"a="<<a<<endl;
  cout<<"result="<<result<<endl;
  return 0; 
}