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     29 
     30 // A sample program demonstrating using Google C++ testing framework.
     31 //
     32 // Author: wan (at) google.com (Zhanyong Wan)
     33 
     34 #ifndef GTEST_SAMPLES_SAMPLE1_H_
     35 #define GTEST_SAMPLES_SAMPLE1_H_
     36 
     37 // Returns n! (the factorial of n).  For negative n, n! is defined to be 1.
     38 int Factorial(int n);
     39 
     40 // Returns true iff n is a prime number.
     41 bool IsPrime(int n);
     42 
     43 #endif  // GTEST_SAMPLES_SAMPLE1_H_
     44