c++ 这题什么意思?怎么写?

题目

c++ 这题什么意思?怎么写?
// Recursive binary search via pointers. If the target is found, return a pointer to it. // Otherwise return NULL.template
int * binarySearch(T * firstPtr, T * lastPtr, const T &target);// Top-level binary search function. Calls the function above.
// Return index of target in values or -1, if target isn't found.template int binarySearch(T values[], int size, const T &target) { int * loc = binarySearch(values, values+size-1, target); return loc == NULL ? -1 : loc-values;
}

答案

二分搜索啦!//假定升序排列template int *binarySearch(T* fistPtr,T* lastPtr,const T& target){T *middle=(fistPtr+lastPtrt)>>1;if (*middle==target){return middle;}if (fistPtr==lastPtr)return null;if (*mid...