题解 | #高精度整数加法#
高精度整数加法
http://www.nowcoder.com/practice/49e772ab08994a96980f9618892e55b6
import java.util.*;
public class Main{
public static void main(String[] args) throws Exception{
Scanner scanner = new Scanner(System.in);
while (scanner.hasNextLine()) {
char[] numA = scanner.nextLine().trim().toCharArray();
char[] numB = scanner.nextLine().trim().toCharArray();
char[] numL = numA.length >= numB.length ? numA : numB;
char[] numS = numA.length < numB.length ? numA : numB;
char[] res = new char[numL.length+1];
res[0] = ' ';
boolean add = false; //表示是否进位
for (int i = 1; i <= numL.length; i++) {
int temp = numL[numL.length-i] + (i <= numS.length ? numS[numS.length-i]-'0' : 0);
if(add) temp++;
res[res.length - i] = (char)temp;
if (res[res.length - i] > '9') {
res[res.length - i] = (char)(res[res.length - i] - 10);
add = true;
} else {
add = false;
}
}
if (add) res[0] = '1';
for (char c : res) {
if (c != ' ') {
System.out.print(c);
}
}
System.out.println();
}
scanner.close();
}
}