zoj 2240 Run Length Encoding

#include <stdio.h>#define UNKNOW    0   #define SUBSTR    1   #define REPEAT    2    void put_one_char(char c){    if(c == '1') printf("11");    else putchar(c);}void enpre(char* text){    char* p = text;    int status = UNKNOW;    int count;     while(*p)    {        switch(status)        {        case UNKNOW:  if(p[1] != p[0]) {     status = SUBSTR;     printf("1");      put_one_char(*p); } else {     status = REPEAT;     count = 1; } break;        case SUBSTR:  if(p[1] != p[0]) {     put_one_char(*p); } else {     printf("1");      status = REPEAT;     count = 1; } break;        case REPEAT:  count++; if(count == 9 || p[1] != p[0]) {     printf("%d%c", count, *p);     status = UNKNOW; } break;        }        ++p;    }    if(status == SUBSTR) printf("1");}int main(int argc, char* argv[]){    char line[1024];    while(gets(line) != NULL)    {        enpre(line);        printf("n");    }    return 0;}