获取（lldb）输出并在运行时挂起

Question

我有一个计算阶乘，排列和组合的简单程序。我对自己的数学感觉很好，但无论出于什么原因，我都无法执行此程序。完全披露我是C ++的新生。这是我的代码：

#include <iostream>
using namespace std;
int factorial(int);
int permutations(int, int);
int combinations (int ,int);
void perms_and_combs(int, int, int&, int&);
int numPerms;
int numCombs;
int main() {
int factorialVal;
cout << "enter an int!\n";
cin >> factorialVal;
cout << "The factorial of " << factorialVal << " is " << factorial(factorialVal) << endl;
int permVal1;
int permVal2;
do {
    cout << "Input a two values: ";
    cin >> permVal1;
    cout << ", ";
    cin >> permVal2;
} while ( permVal1 < 0 || permVal2 > permVal1);
cout << "test"; // This line doesn't get executed
perms_and_combs(permVal1, permVal2, numPerms, numCombs);
cout << "Number of permutations: "<<numPerms << ". Number of combinations: " << numCombs;
return 0;
}

int factorial(int n) {
int product = 1;
for (int i = 1; i <= n; i++) {
    product *= i;
}
return product;

}

int permutations (int n, int k) {

int result;
int denominator = n-k;
cout << denominator;
result = (factorial(n)/factorial(denominator));
return result;
}
int combinations (int n, int k) {
int result;
result = permutations(n, k) * (1/factorial(k));
return result;
}
void perms_and_combs(int n, int k, int& numPerms, int& numCombs) {
numPerms = permutations(n, k);
numCombs = combinations(n, k);
return;
}