#include using namespace std; #define MAX 1000 /* precision */ void input(char ch[]) { scanf("%s", ch); } void add(char ch1[], char ch2[], char ch3[]) { int len1, len2, len3, maxlen; int sum, flag; len1=strlen(ch1); len2=strlen(ch2); len3=maxlen=len1 >= len2 ? len1 : len2; flag=0; /* jin wei */ while(len1>=1 && len2>=1) { sum=ch1[len1-1]-'0' + ch2[len2-1]-'0' + flag; /* char -> int to calculate sum */ flag=0; if(sum>=10) { sum-=10; flag=1; } ch3[maxlen-1]=sum + '0'; len1--; len2--; maxlen--; } while(len1>=1) { /* if num1[] is longer or maxer */ sum=ch1[len1-1]-'0' + flag; flag=0; if(sum>=10) { sum-=10; flag=1; } ch3[maxlen-1]=sum + '0'; len1--; maxlen--; } while(len2>=1) { /* if num2[] is longer or maxer */ sum=ch2[len2-1]-'0' + flag; flag=0; if(sum>=10) { sum-=10; flag=1; } ch3[maxlen-1]=sum + '0'; len2--; maxlen--; } if(flag != 0) /* if flag, then print gaowei(jinwei) */ printf("%d", flag); for(int i=0; i