3-sum问题

给定一个整数数组，判断能否从中找出3个数a、b、c，使得他们的和为0，如果能，请找出所有满足和为0个3个数对。

#define SIZE 10
void judgeAndPut(int* arr, int target, int begin, int end) {
	while (begin < end) {
		if (arr[begin] + arr[end] + arr[target] > 0) {
			end--;
		} else if (arr[begin] + arr[end] + arr[target] < 0) {
			begin++;
		} else {
			cout << " " << arr[target] << " " << arr[begin] << " " << arr[end]
					<< endl;
			begin++;
			end--;
			while (begin + 1 < end && arr[begin - 1] == arr[begin]) {
				begin++;
			}
			while (end - 1 > begin && arr[end + 1] == arr[end]) {
				end--;
			}
		}
	}
}

void findThreeSumEq0(int* arr) {
	qsort(arr, SIZE, sizeof(int), myCmp);

	for (int i = 0; i < SIZE; i++) {
		cout << " " << arr[i];
	}
	cout << endl;
	for (int i = 0; i < SIZE - 2; ++i) {
		if (i != 0 && arr[i] == arr[i - 1]) {
			continue;
		}
		judgeAndPut(arr, i, i + 1, SIZE - 1);
	}
}