Question No.5: Suppose we have a file STD.doc containing roll numbers, name and marks of some students. Write a program to read the name of a student and check whether the record of this student I...

Write a C program and also attach its output screenshots.

Extracted text: Question No.5: Suppose we have a file STD.doc containing roll numbers, name and marks of some students. Write a program to read the name of a student and check whether the record of this student I available in this file. If the record is available then print it with an appropriate message, otherwise print the message "Record does not exist". Question No.6: Suppose three umbers x, y, z are passed to a function. Implement this function to assign the values of y to x, z to y and x to z and return these three changed values to main. Use pointer.