[英]Variable won't increment. - Greatest Common Divisor in java
我的任務是接受 2 個分數並將它們相加,然后以最簡單的形式返回。
出於某種原因,“gcd = i;”行執行時不運行,因此我的程序在運行時進入無限循環。
import java.util.*;
class fraction {
public static void main(String[] args) {
int num1, den1, num2, den2;
Scanner sc = new Scanner(System.in);
/* System.out.print("Enter first numerator:");
num1 = sc.nextInt();
System.out.print("Enter first denominator:");
den1 = sc.nextInt();
System.out.print("Enter second numerator:");
num2 = sc.nextInt();
System.out.print("Enter second denominator:");
den2 = sc.nextInt(); */
num1 = 1;
den1 = 2;
num2 = 1;
den2 = 2;
System.out.print(num1 + "/" + den1 + " + " + num2 + "/" + den2 + " is equal to ");
int num = num1 * den2 + den1 * num2;
int dum = den1 + den2;
System.out.println(num + "/" + dum);
System.out.println(num % dum);
int gcd = 2;
while (num % dum == 0) {
for (int i = 1; i < num && i < dum; ++i) {
if (num % i == 0 && dum % i == 0) {
gcd = i;//This line.
System.out.println(gcd + " " + i);
}
}
num = num / gcd;
dum = dum / gcd;
}
System.out.println(num + "/" + dum);
}
}
你總是輸入 gcd = i;
問題是在聲明的結尾你有
num1 1
den1 2
num2 1
den2 2
num 2
dum 2
gcd 1
所以num = num/gcd
返回 2 並且dum = dum/gcd
= 2。所以你不能 go 退出 while 循環
也許你可以在 for 循環中解決 for (i =2...)
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