如何实现大整数相加？@漫画-蒲公英云

如何实现大整数相加？@漫画

短命女 2022-04-14 05:12 366阅读 0赞

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/** * 大整数求和 * @param bigNumberA 大整数A * @param bigNumberB 大整数B */public static String bigNumberSum(String bigNumberA, String bigNumberB) { //1.把两个大整数用数组逆序存储，数组长度等于较大整数位数+1 int maxLength = bigNumberA.length() > bigNumberB.length() ? bigNumberA.length() : bigNumberB.length(); int[] arrayA = new int[maxLength+1]; for(int i=0; i< bigNumberA.length(); i++){ arrayA[i] = bigNumberA.charAt(bigNumberA.length()-1-i) - ‘0’; } int[] arrayB = new int[maxLength+1]; for(int i=0; i< bigNumberB.length(); i++){ arrayB[i] = bigNumberB.charAt(bigNumberB.length()-1-i) - ‘0’; } //2.构建result数组，数组长度等于较大整数位数+1 int[] result = new int[maxLength+1]; //3.遍历数组，按位相加 for(int i=0; i= 10){ temp = temp-10; result[i+1] = 1; } result[i] = temp; } //4.把result数组再次逆序并转成String StringBuilder sb = new StringBuilder(); //是否找到大整数的最高有效位 boolean findFirst = false; for (int i = result.length - 1; i >= 0; i–) { if(!findFirst){ if(result[i] == 0){ continue; } findFirst = true; } sb.append(result[i]); } return sb.toString();}public static void main(String[] args) { System.out.println(bigNumberSum(“426709752318”, “95481253129”));}