[C] Con trỏ mảng - hàm

#include <stdio.h>

/* khai bao ham */

double tinhTB(int *contro, int kichco);

int main ()

{

   /* mot mang so nguyen co 5 phan tu */

   int sohangban[5] = {123, 213, 321, 122, 222};

   double tb;

   /* truyen con tro toi mang duoi dang mot tham so */

   tb = tinhTB( sohangban, 5 ) ;

   /* hien thi gia tri tra ve  */

   printf("Gia tri trung binh la: %f\n", tb );

   printf("\n===========================\n");

   return 0;

}

double tinhTB(int *contro, int kichco)

{

  int    i, tong = 0;

  double tb;

  for (i = 0; i < kichco; ++i)

  {

    tong += contro[i];

  }

  tb = (double)tong / kichco;

  return tb;

}