ECS 30                    Function Examples

    #include<stdio.h>

    int convert( int f ); // prototype

    int main()
    {
        int fheit, celsius;

        printf("Enter temp: ");
        scanf("%d", &fheit);
        celsius = convert(fheit);  // function call
        printf("That is %d in celsius.\n", celsius);
        return 0;
    }

    int convert( int f ) // function definition
    {
       int c;

       c = 5 * (f - 32.0) / 9;
       return c;
    }
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     #include<stdio.h>
     
     double sq(double in); // prototype
     
     int main()
     {
         double x,y;
     
         printf("enter a value: ");
         scanf("%lf", &x);
         y = sq(x);
         printf("Your value squared is: %.2f\n", y);
         y = sq(9.9);
         printf("9.9 squared is: %.2f\n", y);
         return 0;
     }
     
     double sq(double in)
     {
         double z;
     
         z = in * in;
         return(z);
     }

     #include <stdio.h>
     
     double volume(double r, double h); // prototype
     
     int main(void)
     {
         double radius, height, v;
     
         printf("enter radius and height: ");
         scanf("%lf %lf", &radius, &height);
         v = volume(radius, height);
         printf("Cylinder volume is %.2f\n", v);
         return 0;
     }
     
     double volume(double r, double h)
     {
         double vol;
     
         vol = 3.14159 * r * r * h;
     
         return vol;
     }
------------------------------------------------------------
     #include <stdio.h>
     
     int maximum( int x, int y, int z); // prototype
     
     int main()
     {
         int num1, num2, num3, m;
     
         printf( "Enter 3 integers: ");
         scanf( "%d %d %d", &num1, &num2, &num3);
        m = maximum ( num1, num2, num3 );
         printf( "Max is %d\n", m );
        return 0;
     }
     
     int maximum( int x, int y, int z)
     {
         int max = x;
     
         if (y > max)
             max = y;
         if (z > max)
             max = z;
         return max;
     }