判断质数,帮忙看一下,那个地方出问题了???
int prime(int num){
int j;
while(num==1)
return 0;
while(num==2||num==3||num==5||num==7)
return 1;
for(j=3;j*j<=num;j+=2)
if(num%j==0)return 0;
return 1;
}
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