Do it now!

#define DEBUG

#ifdef DEBUG

    #define cprintf(...) printf(__VA_ARGS__)

#else

    #define cprintf(...) 

#endif

#include <iostream>

using namespace std;

int main()

{

   int num = 2;

   auto sum = [](int n) -> int{ return n*n; }(num);

   cout << num << " " << sum << endl;

   return 0;

}

2 4

#include <iostream>

using namespace std;

int main()

{

    for (int i = 0; i < 100; i++) {

       i % 2 ||  cout << i << endl;   

    }

    return 0;

}

#include <stdio.h>

#include <stdlib.h>

#define FALSE 0

#define TRUE  1

int IsSheBeautiful() { return (rand() % 101 > 99); }

int IsSheLikeMe()    { return (rand() % 51  > 49); }

int MeetGirl(int count) {

    int amIcouple = FALSE;

    // printf ("%d : I meet a girl!\n", count);

    if ( IsSheBeautiful() && IsSheLikeMe() ) {

        amIcouple = TRUE;

    }

    return amIcouple;

}

int Process() {

    int amIcouple = FALSE;

    int count = 0;

    while ( amIcouple == FALSE ) {

        amIcouple = MeetGirl(++count);      

    }

    printf ("I met %d girls\n", count);

    return amIcouple; 

}

int main(int argc, char **argv) {

    printf("%s\n", Process() == TRUE ? "I am not a single!" : "I am a sigle");

    return 0;

}

Hi-iMac:Scala chobocho$ cat mulitiplicaiton.scala

for ( x <- ( 1 to 9 )) {

    for ( y <- ( 1 to 9)) {

        println (x + " x " + y + " = " + x*y)

    }

}

Hi-iMac:Scala chobocho$ cat openfile.scala

import scala.io.Source

val openFileName = "sample.scala"

for ( line <- Source.fromFile(openFileName).getLines() ) {

    println(line)

}

scala> (BigInt(1) to BigInt(100)).reduceLeft(_*_)

res8: BigInt = 93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000

scala> BigInt(2).pow(100)

res1: scala.math.BigInt = 1267650600228229401496703205376