宇视科技2015应届生招聘笔试题

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用JAVA实现了分数的加减法，其中输入的字符串为“a/boc/d“，其中a,b,c,d时一个0-9的整数，o是运算符“+“或者“-”

public class Test1 {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		String A = in.next();
		in.close();
		char[] B = A.toCharArray();
		int[] C = new int[4];//用于存储abcd的值
		int ii = 0;
		for (int i = 0; i < C.length; i++) {
			C[i] = Integer.parseInt(String.valueOf(B[ii]));
			ii += 2;
		}
		if (C[1] == 0 || C[3] == 0 ) {
			System.out.println("输入有误，分母不能为0！");
			System.exit(0);
		}
		int temp = 0;
		if (C[1] != C[3]) {//分母不同
			temp = C[1] * C[3];
			C[0] = C[0] * C[3];
			C[2] = C[2] * C[1];
			C[1] = temp;
			C[3] = temp; 
		}
		if (B[3] == '+') {
			temp = C[0] + C[2];
		} else {
			temp = C[0] - C[2];
		}
		int operate = 1;//代表运算后分数的正负号
		if (temp < 0) {
			operate = -1;
		}
		temp *= operate;
		/**
		 * 获得分子分母的公约数
		 */
		int min = 0;
		int max = 0;
		int value = 1;
		if (temp > C[1]) {
			max = temp;
			min = C[1];
		} else {
			max = C[1];
			min = temp;
		}
		for (int i = 2; i <= min; i++) {
			if (min % i == 0 && max % i == 0) {
				value = i;
			}
		}
		temp /= value;
		C[1] /= value;
		temp *= operate;
		if (temp == 0) {
			System.out.println(0);
		} else {
			System.out.println(String.valueOf(temp) + "/" + String.valueOf(C[1]));
		}
		
	}
}