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  1. #include <stdio.h>
  2.  
  3. int main (void)
  4. {
  5. int imang[50], in, isum=0,i;
  6.  
  7. printf("Moi nhap vao so phan tu cu mang: ");
  8. scanf("%d",&in);
  9.  
  10. for(i=0;i<in;i++)
  11. {
  12. printf("Nhap phan tu thu %d: ",i+1);
  13. scanf("%d",&imang[i]);
  14. }
  15.  
  16. for(i=0;i<in;i++)
  17. isum+=imang[i];
  18.  
  19. printf("Trung binh cong la: %5.5lf",(double)isum/in);
  20. }
Success #stdin #stdout 0s 4392KB
stdin
5
1 2 3 4 5
stdout
Moi nhap vao so phan tu cu mang: Nhap phan tu thu 1: Nhap phan tu thu 2: Nhap phan tu thu 3: Nhap phan tu thu 4: Nhap phan tu thu 5: Trung binh cong la: 3.00000