c言語における構造体の定義、初期化及びメモリ割り当て
4031 ワード
#include <stdio.h>
struct person
{
char *name;
int age;
};
int main()
{
// ,
//
// struct person
// {
// char *name;
// int age;
// };
struct person p1;
// ,
//person , 8 ,
// int 4 ,
// person 16
printf("sizeof(p1)=%lu
",sizeof(p1));
p1.name = "jack";
p1.age = 18;
printf("p1.name = %s
",p1.name);
printf("p1.age = %d
",p1.age);
struct person p2 = {"rose",20};
printf("p2.name = %s
",p2.name);
printf("p2.age = %d
",p2.age);
/*
, p3 ,
p3 ,
struct person p;
p={"name",10};
*/
return 0;
}
結果
sizeof(p1)=16
p1.name = jack
p1.age = 18
p2.name = rose
p2.age = 20