c 高精度除以高精度
时间: 2024-01-23 10:15:03 浏览: 26
以下是C++中实现高精度除法的方法:
方法一:使用字符串进行模拟计算
```cpp
#include <iostream>
#include <string>
using namespace std;
string divide(string dividend, string divisor) {
string quotient;
int n = dividend.size();
int m = divisor.size();
int i = 0;
// 处理被除数小于除数的情况
if (dividend < divisor) {
quotient = "0";
return quotient;
}
// 模拟长除法
while (i < n) {
int j = 0;
string temp = dividend.substr(i, m);
// 找到被除数的最高位
while (temp < divisor && i < n) {
temp += dividend[i + m];
i++;
}
// 计算商的当前位
int q = 0;
while (temp >= divisor) {
temp -= divisor;
q++;
}
quotient += to_string(q);
}
return quotient;
}
int main() {
string dividend = "123456789";
string divisor = "987654321";
string result = divide(dividend, divisor);
cout << "Quotient: " << result << endl;
return 0;
}
```
方法二:使用数组进行模拟计算
```cpp
#include <iostream>
#include <vector>
using namespace std;
vector<int> divide(vector<int>& dividend, vector<int>& divisor) {
vector<int> quotient;
int n = dividend.size();
int m = divisor.size();
int i = 0;
// 处理被除数小于除数的情况
if (n < m) {
quotient.push_back(0);
return quotient;
}
// 模拟长除法
while (i < n) {
vector<int> temp(dividend.begin() + i, dividend.begin() + i + m);
// 找到被除数的最高位
while (compare(temp, divisor) < 0 && i < n) {
temp.push_back(dividend[i + m]);
i++;
}
// 计算商的当前位
int q = 0;
while (compare(temp, divisor) >= 0) {
temp = subtract(temp, divisor);
q++;
}
quotient.push_back(q);
}
return quotient;
}
int main() {
vector<int> dividend = {1, 2, 3, 4, 5, 6, 7, 8, 9};
vector<int> divisor = {9, 8, 7, 6, 5, 4, 3, 2, 1};
vector<int> result = divide(dividend, divisor);
cout << "Quotient: ";
for (int i = 0; i < result.size(); i++) {
cout << result[i];
}
cout << endl;
return 0;
}
```