本地变量可能尚未初始化并且循环

I have a program that originally took two numbers passed the values to a method and returned the higher number. I got that so I decided to expand to the program and want the program to ask the user for the 2 numbers. I have 2 problems that I can not figure out. The first is that it is saying that my variables i and j are not initialized. The second is that the program loops 3 times. can someone offer me any assistance. I am coming from c# Thanks. I have a program that originally took two numbe