An example of an int range (algorithmic Race Primer Classic)

For any greater than1The natural numberNnn 3n+1n After several such transformations, it is certain that n13→10→5→16→8→4→2→1 Enter nn≤109 Sample Input:
3 sample
Example Output:
7

1#include <iostream>2#include <iomanip>3#include <cmath>4 using namespacestd;5 6 intMain ()7 {8     intn;9CIN >>n;Ten     intCount =0; one      while(n! =1) a     { -         if(n%2==0) -         { then = n/2; -              -         } -         Else +         { -n =3* n +1; +              a         } atcount++; -     } -cout << Count <<endl; -System"Pause"); -     return 0; -}

For example, The result can be output correctly, but when you enter 987654321, you cannot output the correct Result. The size of int should be-2147483648-2147483647, which is beyond the range of int, and the type of n is defined as long long, so you can output 180 directly.

1#include <iostream>2#include <iomanip>3#include <cmath>4 using namespacestd;5 6 intMain ()7 {8     Long Longn;9CIN >>n;Ten     intCount =0; one      while(n! =1) a     { -         if(n%2==0) -         { then = n/2; -              -         } -         Else +         { -n =3* n +1; +              a         } atcount++; -     } -cout << Count <<endl; -System"Pause"); -     return 0; -}

An example of an int range (algorithmic Race Primer Classic)