Write a program that concatenates two fi les whose names are input as command-line arguments. Write a program that reads fi les foo1 and foo2 and writes foo3 with a line of foo1 followed by a line of...

Write a program that concatenates two fi les whose names are input as command-line

arguments.

Write a program that reads fi les foo1 and foo2 and writes foo3 with a line of foo1 followed

by a line of foo2 and so on. The sequence is terminated when EOF is encountered in one of

the fi les. The program must display the contents of foo3.