Determine the purpose of the programs given below in Exercises 1 through 3. Then rewrite each program using #define statements for appropriate literals.

#include

int main()

{

float radius, circum;

printf(" Enter a radius: ");

scanf("%f", &radius);

circum = 2.0 * 3.1416 * radius;

printf(" The circumference of the circle is %f", circum);

return 0;

}

#include

int main()

{

float prime, amount, interest;

prime = 0.08; /* prime interest rate */

printf(" Enter the amount: ");

scanf("%f", &amount);

interest = prime * amount;

printf(" The interest earned is %f dollars", interest);

return 0;

}