202104 美团优选2-1 算法_美团优选输入输出

字符串数字相加，输出字符串。

代码：

public class Test32 {
    public static void main(String[] args) {
                String s1 = "13";
                String s2 = "212";
 
                int size =0;
                if(s1.length()>s2.length()){
                    size = s1.length();
                }else{
                    size = s2.length();
                }
 
                String returnStr = "";
                int flage = 0;
                Integer jinWei = 0;
                while(flage<size||jinWei>0){
                    //计算C1
                    int intC1 = 0;
                    int indexS1 = s1.length()-flage-1;
                    if(indexS1>=0){
                        Character c1 = s1.charAt(indexS1);
                        intC1 = c1 - '0';
                    }
                    //计算C2
                    int intC2 = 0;
                    int indexS2 = s2.length()-flage-1;
                    if(indexS2 >=0){
                        Character c2 = s2.charAt(indexS2);
                        intC2 = c2 - '0';
                    }
                    //C1,C2相加
                    int weiC = intC1+intC2+jinWei;
                    //判断是否超10，进位。
                    if(weiC>=10){
                        jinWei = 1;
                        weiC = 10 -weiC;
                    }
                    //前缀垒数
                    returnStr = weiC + returnStr;
                    //移动指针
                    flage++;
                }
 
                System.out.println(returnStr);
            }
    }

输出结果：