指针是一个存储另一个变量地址的变量。
指针的特点
指针节省内存空间。
由于直接访问内存位置，指针的执行时间更快。
在指针的帮助下，内存被有效地访问，即动态分配和释放内存。
指针与数据结构一起使用。
声明一个指针
int *p;
这意味着“p”是一个指针变量，它保存另一个整型变量的地址。
指针的初始化
地址运算符（&）用于初始化指针变量。
例如，
int qty = 175;int *p;p= &qty;
通过变量访问变量指针
要访问变量的值，请使用间接运算符 (*)。
程序
现场演示
#includevoid main(){ //Declaring variables and pointer// int a=2; int *p; //Declaring relation between variable and pointer// p=&a; //Printing required example statements// printf("Size of the integer is %d",sizeof (int));//4// printf("Address of %d is %d
",a,p);//Address value// printf("Value of %d is %d
",a,*p);//2// printf("Value of next address location of %d is %d
",a,*(p+1));//Garbage value from (p+1) address// printf("Address of next address location of %d is %d
",a,(p+1));//Address value +4// //Typecasting the pointer// //Initializing and declaring character data type// //a=2 = 00000000 00000000 00000000 00000010// char *p0; p0=(char*)p; //Printing required statements// printf("Size of the character is %d
",sizeof(char));//1// printf("Address of %d is %d
",a,p0);//Address Value(p)// printf("Value of %d is %d
",a,*p0);//First byte of value a - 2// printf("Value of next address location of %d is %d
",a,*(p0+1));//Second byte of value a - 0// printf("Address of next address location of %d is %d
",a,(p0+1));//Address value(p)+1//}
输出
Size of the integer is 4Address of 2 is 6422028Value of 2 is 2Value of next address location of 2 is 10818512Address of next address location of 2 is 6422032Size of the character is 1Address of 2 is 6422028Value of 2 is 2Value of next address location of 2 is 0Address of next address location of 2 is 6422029
以上就是编写一个C程序，演示指针的示例的详细内容，更多请关注创想鸟其它相关文章！
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