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作业

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study_llroad

#1 Created at ... [Delete] [Delete and Lock User] 
double pi=1;
double m=1;
for(int i=0;i<1000;i++){
    if(i%2==0){
        pi-=1/(m+2);
    }else{
        pi+=1/(m+2);    
    }
    m+=2;
}
System.out.println(pi*4);

study_llroad

#2 Created at ... [Delete] [Delete and Lock User] 
double pi=1;for(int i=1;i<100000;i++){    if(i%2!=0){        pi-=1/(double)(i*2+1);    }else{        pi+=1/(double)(i*2+1);    }}System.out.println(pi*4);
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