C Pointer

#include <stdio.h>

int main(void){

 int num = 90;
 int *pnum = &num;
 printf("%d \n", num); // cup (coffee)
 printf("%d \n", *pnum); // point to address (coffee)
 printf("%p \n", &num); // address of cup
 printf("%p \n", pnum); //cup (address of cup)

 printf("============ \n");

 char *grade = "A+"; // address of 'A' (0xbf83c4e4)
 printf("%s \n", grade); // cup (converting the first address to string)
 printf("%p \n", grade); // cup (the first address of string)
 printf("%c \n", *grade); // point to the value of the first address (c)
 printf("%d \n", *grade); // point to the value of the first address (d)

printf("== Insert Number =======>> \n");

int num1;
scanf("%d", &num1);
printf("%d \n", num1);

printf("== Insert any Words =======>> \n");

char *str;
scanf("%s", str);
printf("%s \n", str);

 return 0;
}