#include <stdio.h> #include <time.h> #include <stdlib.h> int main() { int input; printf("Please input the radius! \n"); scanf("%d",&input); const float PI=3.14159; printf("The area=%f\n",PI*input*input); system("pause"); return 0; }
#include <stdio.h> #include <time.h> #include <stdlib.h> int main() { int input; printf("Please input the radius! \n"); scanf("%d",&input); const float PI=3.14159; printf("The area=%f\n",PI*input*input); system("pause"); return 0; }