/* Chapter 5 - Program 7 - FLOATSQ2.C */
#include <stdio.h>    /* Prototypes for standard Input/Outputs     */

float sqr(float inval);
float glsqr(void);

float z;   /* This is a global variable */

int main()
{
int index;
float x, y;

   for (index = 0 ; index <= 7 ; index++)
   {
      x = index;       /* convert int to float                  */
      y = sqr(x);      /* square x to a floating point variable */
      printf("The square of %d is %10.4f\n", index, y);
   }

   for (index = 0 ; index <= 7 ; index++) 
   {
      z = index;
      y = glsqr();
      printf("The square of %d is %10.4f\n", index, y);
   }

   return 0;
}


float sqr(float inval)  /* square a float, return a float */
{
float square;

   square = inval * inval;
   return(square);
}


float glsqr(void)    /* square a float, return a float */
{
   return(z * z);
}



/* Result of execution

The square of 0 is     0.0000
The square of 1 is     1.0000
The square of 2 is     4.0000
The square of 3 is     9.0000
The square of 4 is    16.0000
The square of 5 is    25.0000
The square of 6 is    36.0000
The square of 7 is    49.0000
The square of 0 is     0.0000
The square of 1 is     1.0000
The square of 2 is     4.0000
The square of 3 is     9.0000
The square of 4 is    16.0000
The square of 5 is    25.0000
The square of 6 is    36.0000
The square of 7 is    49.0000

*/