(It is known that there are 300 four-digit numbers in the file IN.DAT, and the read function readDat() has been called to store these numbers in the array a. Please compile a function jsValue(), whose function is to obtain the comprehensive four-digit number The number is the number of prime numbers cnt, and then obtain the four-digit average pjz1 that fully satisfies this condition, and the four-digit average pjz2 that does not fully satisfy this condition. After all, the main() function calls the write function writeDat() to put the effect cnt, pjz1, pjz2)