1.Develop a program that will read and store the details of a list of students in the format and produce the following output list: (a) Alphabetical list of names, roll numbers and marks obtained. (b)...

and produce the following output list:

(a) Alphabetical list of names, roll numbers and marks obtained.

(b) List sorted on roll numbers.

(c) List sorted on marks (rank-wise list)

2. Write a program to read two strings and compare them using the function strncmp ( )

and print a message that the first string is equal, less, or greater than the second one.

3. Write a program to read a line of text from the keyboard and print out the number of

occurrences of a given substring using the function strstr ( ).