草稿本，什么也没有

#include <iostream>
#include <cmath>
#include <iomanip>
 
using namespace std;
 
// 手动实现 GCD 函数
int gcd(int a, int b) {
    while (b != 0) {
        int t = b;
        b = a % b;
        a = t;
    }
    return a;
}
 
// 函数用于计算分数
void decimalToFraction(double decimal, int cycleLength) {
    if (cycleLength == 0) {
        // 当没有循环节时
        int denominator = 1;
        while (decimal != static_cast<int>(decimal)) {
            decimal *= 10;
            denominator *= 10;
        }
        int numerator = static_cast<int>(decimal);
        
        // 约分
        int divisor = gcd(numerator, denominator);
        numerator /= divisor;
        denominator /= divisor;
 
        cout << "分数形式: " << numerator << "/" << denominator << endl;
    } else {
        // 当有循环节时
        string cycle;
        cout << "请输入小数的循环节（不带小数点）: ";
        int temp3;
        cin>>temp3;
        cycle=temp3;
		int temp=pow(10,cycleLength);
    	float d2=decimal*temp+decimal;
    	float temp2=d2-decimal;
    	for(int i=temp3;i>0;i--){
    		if((temp-1)%i==0&&temp3%i==0){
    			temp=(temp-1)/i;
    			temp3=temp3/i;
    			break;
			}
		}
    	cout<<temp3<<"/"<<temp;
    }
}
 
int main() {
    double decimal;
    int cycleLength;
 
    cout << "请输入一个小数: ";
    cin >> decimal;
 
    cout << "请输入小数的循环节长度（没有循环节输入0）: ";
    cin >> cycleLength;
 
    decimalToFraction(decimal, cycleLength);
 
    return 0;
}