>>111
prog.cs(15,8): error CS0165: Use of unassigned local variable `keisan1'
prog.cs(17,29): error CS0165: Use of unassigned local variable `keisan2'
prog.cs(17,38): error CS0165: Use of unassigned local variable `mojisuu'
prog.cs(19,9): error CS0165: Use of unassigned local variable `kekka'
prog.cs(23,19): error CS0165: Use of unassigned local variable `kekka'
Compilation failed: 5 error(s), 0 warnings

visual c#でもコンパイルエラーになる