mencari indeks array

#include<stdio.h>
main()
{
      int f[5];
      int a;
      int b;
      
      printf("\t\t=============================\n");
      printf("\t\t|Program Array Mencari Index|\n");
      printf("\t\t|http:\\belprog.blogspot.com|\n");
      printf("\t\t=============================\n\n");
      
      for(a=0;a<=4;a++)
      scanf("%i",&f[a]); 
      printf("\n");
      printf("Hasilnya \n");
      printf("-------- \n");
    

      for(a=0;a<=4;a++)
      printf("Index ke-[%i] = %i\n",a,f[a]);
      printf("\n");
      
      printf("Pilih index ke- ");
      scanf("%d",&b);
      printf("Hasil ");
      printf("%d",f[b]);
      printf("\n");   
      
      system("pause"); 
          
}