1. Write a program that removes all blank lines from a fi le, whose name is input by the user. The output filename has the “new_” prefix to the input filename. (A blank line comprises only zero or...

1. Write a program that removes all blank lines from a fi le, whose name is input by the user. The output filename has the “new_” prefix to the input filename. (A blank line comprises only zero or more whitespace characters.)

2. Write a program that first creates a string (with the NUL) by appending each lowercase letter to a char array in a loop. The string must next be written to a fi le and read back for display.

3. Write a program that accepts a search string from the user and then searches a fi le foo (using a library function) for displaying all lines containing the string. If the string is not found, an appropriate message must be displayed.