李双45678

摘要： 1..#includeint main(void){int n,r,h,i;double v;printf("Enter n:");scanf("%d",&n);for(i=0;i0&&h>0){v=3.14*r*r*h;printf("%lf\n",v);}else {printf("error");}}return 0;}2#includeint main(void){double Q,money;printf("Enter Q:");scanf("% 阅读全文

摘要： 2#includeint main(void){int count,i,n;double grade,total;printf("Enter n:");scanf("%d",&n);total=0;count=0;for(i=1;i=60){count++;}}printf("Grade average=%.2f\n",total/n);printf("Number of success=%d\n",count);return 0;}3.#includeint main(void){int letter,d 阅读全文