神幻绝尘

摘要： #includeint main(){int i,n,x,a;scanf("%d",&n);for(i=0;ii;x--){printf(" ");}for(a=1;a<=2*i-1;a++){printf("* ");}printf("\n");}return 0;} 阅读全文

摘要： #includeint main(){int c=1,b=1;double x=0,a=1.0;while(a>=1e-6){x=x+a*c;c=-c;b=b+2;a=1.0/b;}printf("%lf\n",4*x);return 0;} 阅读全文

摘要： #include#includeint main(){int i,n,t,a;scanf("%d",&n);t=sqrt(n);for(i=2;i<=t;i++){ a=n%i; if (a==0) break;}if(a==0){printf("非质数\n");}else{printf("质数\n... 阅读全文