Given two integersdividend
anddivisor
, divide two integers without using multiplication, division and mod operator.
Return the quotient after dividingdividend
bydivisor
.
The integer division should truncate toward zero.
Example 1:
Input:
dividend = 10, divisor = 3
Output:
3
Example 2:
Input:
dividend = 7, divisor = -3
Output:
-2
Note:
- Both dividend and divisor will be 32-bit signed integers.
- The divisor will never be 0.
- Assume we are dealing with an environment which could only store integers within the 32-bit signed integer range: [−2 31 , 2 31 − 1]. For the purpose of this problem, assume that your function returns 2 31 − 1 when the division result overflows.
class Solution {
public:
int divide\(int dividend, int divisor\) {
int result;
if \(divisor == 0\) return INT\_MAX;
if \(\(dividend == INT\_MIN\)&&\( divisor == -1\)\) return INT\_MAX;
if \(\(dividend<0\)&&\(divisor<0\)\|\|\(dividend>0\)&&\(divisor>0\)\){
return dividend/divisor;
}
else{
return -abs\(dividend\)/abs\(divisor\);
}
}
};考虑两种会溢出的情况,第一种是除数为0,第二种是INT_MIN/-1