Funo Pegalinha

void pegalinha(char *str, int tam) {  int x = 0;  do {    str[x] = getchar();    if (str[x] == '\n') {      break;    }    x++;  } while (x < tam-1);  if (str[x] != '\n' && x == tam-1)    ungetc(str[x], stdin);  str[x] = '\0';}