1005. Spell It Right (20)

#include"stdio.h"int main(){int a=0,c=0;char str1[120];gets(str1);while(str1[a]!='\0'){        c=c+str1[a]-'0';        a++;}int i=0;char str[120];if(c==0)        printf("zero");while(c){        a=c%10;        str[i]=a+'0';        i++;        str[i]=' ';        i++;        c=c/10;}i-=2;while(i>-1){        switch(str[i]){            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;            case '0':printf("zero");break;            default:printf(" ");break;        }        i--;}    getchar();getchar();return 0;}