vector<int> twoSum(vector<int>& numbers, int target) {
vector<int> ans;
int len = numbers.size();
for (int index2 = 1;index2<len;index2++)
{
int t = target-numbers[index2],a = 0,b = index2-1;
int index1 = find(numbers,a,b,t);
if (index1>=0)
{
ans.push_back(index1+1);
ans.push_back(index2+1);
//return ans;
}
}
return ans;
}
已经确保ans是非空,那么为什么最后一句return ans不能写在注释处?
如果写了会报 error: non-void function does not return a value in all control paths [-Werror,-Wreturn-type]
}