Why am i not able to print 47th fibonacci number correctly?

Question

I am using 64 bit operating system ,then also i am not able to print 46th fibonacci number correctly which is less than 4 billion.

#include
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Answer 1

Either Use an unsigned integer array or for more higher values use unsigned long long long array but you don't need an array to print fibonacci series you can simply do this:-

void main()
{
  unsigned long long i=1, num1=1, num2=0;
  printf("1 \n");
  for(i; i<100 ; i++)
   {
     num1=num1+num2;
     num2=num1-num2;
     printf("%lli \n", num1);
   }
  getch();
 }