10月14号作业1(计算圆面积)
#include<stdio.h> int main(void) { double r,s; printf("Enter r:"); scanf("%lf",&r); if(r<=0) printf("NOT FOUND"); else s=r*r*3.1415926; printf("s=%lf\n",s); return 0; }
#include<stdio.h> int main(void) { double r,s; printf("Enter r:"); scanf("%lf",&r); if(r<=0) printf("NOT FOUND"); else s=r*r*3.1415926; printf("s=%lf\n",s); return 0; }