C language structure notes

typedef to alias the structure

It can be anonymous or configuration of conventional construction, to facilitate later use.

#include<stdio.h>
typedef struct{ //匿名结构
    float tank_capacity;
    int tank_psi;
    const char *suit_material;
} equipment;   //结构的别名

typedef struct scuba{ //结构名
    const char *name;
    equipment kit;
} diver;

void badge(diver d){
    //使用“点表示法”访问结构的值，不能使用下标
    printf("Name:%s Tank:%2.2f(%i) Suite:%s\n",d.name,d.kit.tank_capacity,d.kit.tank_psi,d.kit.suit_material);

};

int main(){
    diver randy = {"Randy",{5.5,3500,"Neoprene"}};
    badge(randy);
    return 0;
}

Assignment to structure elements

In the C language, when the structure is assigned, the computer copies the value of the structure. It is necessary to structure pointer

typedef sturct{
  const char *name;
  int age;
} turtle;

turtle t={"lisa",12}

(* t) .age and different meanings t.age
t.age equal * (t.age), which represents the contents of this memory cell.
Typically for easy reading (* t) .age another form of writing
(* t) .age T-==> age
T-> age means "point t by the age field structure."