หน้า 28

#include<stdio.h>
#include<conio.h>
float myavg(void)
{
     float a,b,avg;
     printf("Enter a : ");
     scanf("%f",&a);
     printf("Enter b : ");
     scanf("%f",&b);
     avg = (a+b)/2;
     return(avg);
}
main()
{
      float avg;
      avg = myavg();
      printf("Average is %.2f\n",avg);
      getch();
}