Err 1 CALL SORT(O, p, q) is a one-dimensional array of integer type, which is not defined in the main program.

Err2 and 3, similarly, P and Q are not declared in the main program;

Finally, CALL SORT(O, p, q) in the main program needs to assign values to these variables.

This is a sorting program. As far as the function of this program is concerned, it can only operate on the first 10 variables of array O. ..