UVaOJ 445 Marvelous Mazes

#include <stdio.h>
#include <string.h>
#include <ctype.h>

char c;
int main()
{
//freopen("in.txt","r",stdin);
//freopen("out.txt","w",stdout);
int sum = 0;
while(scanf("%c",&c)!=EOF)
{
if(isdigit(c))
{
sum+=(int)(c-48);
}
else
{
switch(c)
{
case '\n':
printf("\n");
break;
case 'b':
for(int i=0; i<sum; i++)printf(" ");
break;
case '!':
printf("\n");
break;
default:
for(int i=0; i<sum; i++)printf("%c",c);
break;
}
sum = 0;
}
}
return 0;
}