variable declaration in c syntax

#include <stdio.h>

int main(void)
{
  int money;            
  money = 10000;        
  printf("My salary is %d.", money);
  return 0;
}

variable declaration in c++ syntax

// operating with variables

#include <iostream>
using namespace std;

int main ()
{
  // declaring variables:
  int a, b;
  int result;

  // process:
  a = 5;
  b = 2;
  a = a + 1;
  result = a - b;

  // print out the result:
  cout << result;

  // terminate the program:
  return 0;
}