From the previous lab exercise, extract the code to check if a given number is prime or not and organise it into a function called isPrime(). 

FILE *fp1 = fopen("states.txt", "r");
while ((ch = fgetc(fp1)) != EOF)
          putchar(ch);
fclose(fp1);

Write the equivalent Unix command for the above code.

fopen() can be used to read from or write into a file stream.

The

file

Additional

exercises:

• Pick only those odd numbers from the ten

  numbers of the file and write these odd numbers, as well as their average into an

  output file.

• Next, modify the original program so that

  instead of assuming the number of integers to be read from the file, the

  program reads till all the integers of the file are read.

Write a program to implement the cp

command of Unix.

Which of the

following statements about arrays in C is correct?