我正在尝试将两个字符串相乘,但是得到的答案不正确。希望能得到帮助:
public class stringmultiplication {
public static void main(String[] args) {
String s1 = "10";
String s2 = "20";
int num = 0;
for(int i = (s1.toCharArray().length); i > 0; i--)
for(int j = (s2.toCharArray().length); j > 0; j--)
num = (num * 10) + ((s1.toCharArray()[i - 1] - '0') * (s2.toCharArray()[j - 1] - '0'));
System.out.println(num);
}
}