如何将int转换为char类型并使用它来停止循环？

I am new in C programming. I wrote a programme with "for" loop which will take two int type inputs K and M and print out the calculation (of hash function in division method). And if I enter q or Q as the input of K or M then it will exit. How will i do that? anyone help me.I am new in C programming. I wrote a programme