javaÎÊÌâ
1.public class cc {
public double sum(){
double m=1;
double n=2;
double sum=0;
for(int i=0;i <20;i++ ){
sum=sum+m/n;
double temp=m;
m=n;
n=m+temp;
}
return sum;
}
public static void main(String[] args){
cc t=new cc();
System.out.println(t.sum());
}
}
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