#include

void
main()
{
char *str="";
int n1=0,n2=0;
printf("n1= %d,\nn2= %d,\nstr= %s\n",n1,n2,str);
printf("enter number string number\n");
str = (char *)malloc(1);
scanf("%d %s %d",&n1,str,&n2);
printf("n1= %d,\nn2= %d,\nstr= %s\n",n1,n2,str);
free(str);
}

why I did not get any "segmentation fault error" or other run-tuime errors when I enter strings longer then one char?