#include <stdio.h>
int main(void) {
// your code goes here
const double pi=3.14159;
double r,circum,area;
circum = 2*pi*r;
area = pi*r*r;
printf("circumference =%f,area= %f\n",circum
,area
); printf("circumference =%7.2farea =%7.2f\n",circum
,area
); return 0;
}
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