Character pointer assignment [easy to understand]

Hello everyone, we meet again, I'm your friend Quanstack Jun.

Program 1: Assign two identical strings to two different pointers.Compare two pointers

#include int main(void) { char *a;

printf("%p/n",a); printf("%d/n",sizeof(a)); //Define a pointer (one byte), the value in the pointer variable is random,So this pointer is also called a dangling pointer.a = "hello"; printf("%p/n",a); printf("%d/n",sizeof(a)); char *b="hello"; printf("%p/n",b); printf(“%d/n”,sizeof(b));

if(a==b) printf("YES"); else printf("NO"); getchar();

}

Program 2: Assign two identical characters to two different pointers.Compare two pointers

#include int main(void) { char *a; printf(“%p/n”,a); printf(“%d/n”,sizeof(a)); //defineA pointer (one byte), the value in the pointer variable is random, so this pointer is also called a dangling pointer.a = 'A'; printf("%p/n",a); printf("%d/n",sizeof(a)); char *b='A'; printf("%p/n",b); printf(“%d/n”,sizeof(b));

if(a==b) printf("YES"); else printf("NO"); getchar();

}

Program 3: Assign the string "A" to the character pointer;

#include int main(void) { char *a; printf(“%p/n”,a); printf(“%d/n”,sizeof(a)); a = “A”; printf(“%p/n”,a); printf(“%d/n”,sizeof(a)); char *b=”A”; printf(“%p/n”,b);printf(“%d/n”,sizeof(b));

if(a==b) printf("YES"); else printf("NO"); getchar();

}

The result is

1.

2.

3.

Summary:

1. Assigning a string to a pointer is to pass the first address of the string to the pointer.

2. Assigning a character to a pointer means passing the ACSII of the character to the pointer.

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