everest% cc scan5.c
everest% 

everest% a.out
Enter an integer: 12
r = 1, c = 12
everest% 

everest% a.out
Enter an integer: abc
Enter an integer: Enter an integer: Enter an integer: Enter an integer:
Enter an integer: Enter an integer: Enter an integer: Enter an integer:
Enter an integer: Enter an integer: Enter an integer: Enter an integer:
Enter an integer: Enter an integer: Enter an integer: Enter an integer:
Enter an integer: Enter an integer: Enter an integer: Enter an integer:
Enter an integer: Enter an integer: Enter an integer: Enter an integer:
Enter an integer: Enter an integer: Enter an integer: Enter an integer:
Enter an integer: Enter an integer: Enter an integer: Enter an integer:
Enter an integer: Enter an integer: Enter an integer: Enter an integer:
Enter an integer: Enter an integer: Enter an integer: Enter an integer: