二分法查找

int FindKey(int m[],int n,int nValue){int nFirst = 0;int nSecond = n;int nMid = (nFirst+nSecond)/2;while (m[nMid] != nValue){if (m[nMid] > nValue){nSecond = nMid;}else{nFirst = nMid;}nMid = (nFirst+nSecond)/2;}return nMid;}