Hello,World

 

1.C/C++
#include
#include
int main(int argc, char * argv[])
{
    printf("Hello, World! ");
    return 0;
}

2.bash
#!/bin/bash
echo Hello, World!

3.Perl
#!/usr/bin/perl
print "Hello, World! ";

3.Python
#!/usr/bin/python
print "Hello, world!";

4.Java
class Hello{
public static void main(String args[]) {
    System.out.println("Hello world! ");
    }
}

5.汇编...曾经会写 -_-b

6.MPI -- Hello, World!
#include
#include
int main( int argc, char *argv[])
{
    int done = 0, n, myid, numprocs, i;
    double mypi, pi, h, sum, x;
    double startwtime = 0.0, endwtime;
    int  namelen;
    char processor_name[MPI_MAX_PROCESSOR_NAME];
    MPI_Init(&argc,&argv);
    MPI_Comm_size(MPI_COMM_WORLD,&numprocs);
    MPI_Comm_rank(MPI_COMM_WORLD,&myid);
    MPI_Get_processor_name(processor_name,&namelen);
    printf("Hello,world! Process %d on %s ",myid, processor_name);
    if (myid == 0)
    {
            startwtime = MPI_Wtime();
    }
    if (myid == 0)
    {
        endwtime = MPI_Wtime();
        printf("wall clock time = %f ",
              endwtime-startwtime);
    }
    MPI_Finalize();
    return 0;
}

7. php 添加于2010-12

echo "hello, world!\n";