I wrote code that replaces integers from 0 to 3 with strings. I was only allowed to use `getchar()` and `putchar()`. If the input is 1, the output will become "one".

```
#include <stdio.h>

int main()
{

int c;            

char* arr[4] = {"zero", "one", "two","three"};

int i;

  while ((c = getchar ()) != EOF) 
    {

        if(c==0+'0'){
        char* str = arr[0];
    for (i = 0; str[i] != '\0'; i++) {

    putchar(str[i]);

}
}

else if(c==1+'0'){
char* str = arr[1];
      for (i= 0; str[i] != '\0';i++) {

    putchar(str[i]);

}
}

else if(c==2+'0'){
char* str = arr[2];
      for (i = 0; str[i] != '\0'; i++) {
        putchar(str[i]);

}
}
else if(c==3+'0'){

    char* str = arr[3];
     for (i = 0; str[i] != '\0'; i++) {
    putchar(str[i]);

}   
}

        else
        putchar(c);

   }

return 0;

}

```

The code is pretty long. Is there a shorter way to write it?