Can anyone help with the following problems?
1.a) Write a C program that reads text from an input file, converts any upper case letters to lower case, and writes the resulting text to an output file.
1.b) Write a C program that reads text from an input file, copies all lower case letters and white space characters to an output text file, and discard any other characters.
1.c) Write a program that reads a file of words (assumed to be in lower case letters) and prints out the total number of words in the file.
If anyone can help I will be really grateful!