为什么当我打印时，对于 *str 的十进制（ASCII 中的字母 P）显示为 80？

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main ()
{
   char *str;

   /* Initial memory allocation */
   str = (char *) malloc(15);

   strcpy(str, "tutorialspoint");
   printf("String = %s,  Address = %u\n", str, str);

   /* Reallocating memory */
   str = (char *) realloc(str, 25);

   strcat(str, ".com");
   printf("String = %s,  Address = %u\n", str, str);

   /* Deallocate allocated memory */
   free(str);

   printf("\n%d",*str);
   return(0);

}