PAT(A) 1005

#include<stdio.h>#include<stdlib.h>int main(){char num[101];int sum,i;int a[3];scanf("%s",num);i = 0;sum = 0;while(num[i]!='\0'){sum += num[i] - '0';i++;}a[2] = sum / 100;a[1] = (sum - a[2]*100)/10;a[0] = sum % 10;i = 2;while(a[i] == 0&&i)i--;while(i>0){switch(a[i]){case 0:printf("zero");break;case 1:printf("one");break;case 2:printf("two");break;case 3:printf("three");break;case 4:printf("four");break;case 5:printf("five");break;case 6:printf("six");break;case 7:printf("seven");break;case 8:printf("eight");break;case 9:printf("nine");break;}printf(" ");i--;}switch(a[0]){case 0:printf("zero");break;case 1:printf("one");break;case 2:printf("two");break;case 3:printf("three");break;case 4:printf("four");break;case 5:printf("five");break;case 6:printf("six");break;case 7:printf("seven");break;case 8:printf("eight");break;case 9:printf("nine");break;}printf("\n");return 0;}