Three ways to calculate the n-th 2 (C language Implementation)

The C code is as follows:

1#include <stdio.h>2 3 intFunc1 (intN)4 {5     return 1<<N;6 }7 8 intFunc2 (intN)9 {Ten      One     if(n==0) A     { -         return 1; -     } the      -     returnFUNC2 (n1)*2; - } -  + intFUNC3 (intN) - { +     intC=1, I; A      for(i=0; i<n; i++) at     { -c*=2; -     } -      -     returnC; - } in  -  to intMainvoid) + { -     intn=Ten; the      *printf"Func1 calculates 2 of%d times as:%d\n", N, func1 (n)); $printf"Func2 calculates 2 of%d times as:%d\n", N, Func2 (n));Panax Notoginsengprintf"Func3 calculates 2 of%d times as:%d\n", N, func3 (n)); -  theSystem"Pause"); +     return 0; A}

Run after compiling in the dev C + + environment with the following output:

FUNC1 calculates 2 of the 10-time Square: 1024
FUNC2 calculates 2 of the 10-time Square: 1024
FUNC3 calculates 2 of the 10-time Square: 1024
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Three ways to calculate the n-th 2 (C language Implementation)