标签：book print ted not use point png double break
1. Codes from the textbook
/*******************************************************
* Finds and prints n prime integers
* Jeff Offutt, Spring 2003
******************************************************/
public static void printPrimes (int n)
{
int curPrime; // Value currently considered for primeness
int numPrimes; // Number of primes found so far.
boolean isPrime; // Is curPrime prime?
int [] primes = new int [n]; // The list of prime numbers.
// Initialize 2 into the list of primes.
primes [0] = 2;
numPrimes = 1;
curPrime = 2;
while (numPrimes < n)
{
curPrime++; // next number to consider ...
isPrime = true;
for (int i = 0; i <= numPrimes-1; i++)
{ // for each previous prime.
if (isDivisible(primes[i], curPrime))
{ // Found a divisor, curPrime is not prime.
isPrime = false;
break; // out of loop through primes.
}
}
if (isPrime)
{ // save it!
primes[numPrimes] = curPrime;
numPrimes++;
}
} // End while
// Print all the primes out.
for (int i = 0; i <= numPrimes-1; i++)
{
System.out.println ("Prime: " + primes[i]);
}
} // end printPrimes
static boolean isDivisible(int x, int y){
int a = y/x;
double b = (double)y/(double)x;
// System.out.println(a);
// System.out.println(b);
if(b-a == 0){
return true;
}
else{
return false;
}
}
2. Control flow graph
2. For instance, when the greatest prime is below 4, n=5 is in front of n = 3
3. When n < 2, the while loop will not be executed.
4. Point Coverage: {1,2,3,4,5,6,7,4,7,8,9,10,11}
Edge Coverage: {{1,2},{2,3},{3,4},{4,7},{4,5},{5,4},{5,6},{6,7},{7,8},{7,2},{8,2},{2,9},{9,10},{10,9},{9,11}}
Main Path Coverage: {（1,2,3,4,5,6,8），（1,2,3,4,5,6,7,9,10），（1,2,3,4,5,6,7,9），（1,2,3,4,5,9,10），（1,2,3,4,5,9），（3,4,5,6,7,9,10,2,11），（3,4,5,6,7,9,2,11），（3,4,5,6,7,9,10,2,11），（3,4,5,6,7,9,2,11），（3,4,5,9,10,2,11），（3,4,5,9,2,11），（3,4,5,9,10,2,11），（3,4,5,9,2,11），（6,8,5,9,10,2,11），（6,8,5,9,2,11），（6,8,5,9,10,2,11），（6,8,5,9,2,11），（5,6,8,5），（2,3,4,5,6,7,9,10,2），（2,3,4,5,6,7,9,2），（2,3,4,5,9,10,2），（2,3,4,5,9,2）}
5. Test the Main Path Coverage based on Junit and Eclemma
Set n=2 in path1 and set n=5 in path2
Use the following method printPrimes() for questions a-d (inside the textbook)
标签：book print ted not use point png double break
原文地址：http://www.cnblogs.com/sjhchengxuyuan/p/6551072.html
