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public class Ronot {
        int temp=0;
int Robot(int n){
        //int temp=0;
        while(n>2){
                temp=(n-2)+Robot(n-2);
                n--;
        }
        return temp;
}
public static void main(String[] args) {
        Ronot obj=new Ronot();
        System.out.println(obj.Robot(4));
}
}

gnatgcc -c -pipe -O2 prog.adb
prog.adb:1:01: compilation unit expected
prog.adb:3:17: illegal character, replaced by "("
prog.adb:5:19: illegal character, replaced by "("
prog.adb:8:09: illegal character, replaced by ")"
prog.adb:10:01: illegal character, replaced by ")"
prog.adb:11:31: illegal character, replaced by "("
prog.adb:14:01: illegal character, replaced by ")"
prog.adb:15:01: illegal character, replaced by ")"
gnatmake: "prog.adb" compilation error

Standard output is empty