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结构体的应用与理解.戴维营第九天
学了结构体,通过从最简单结构体输入到结构体数组,结构体指针,结构体作为函数参数,包含结构的结构,每种都进行敲代码来理解和体会,另外还学到了栈,先进后出,后进先出,堆需要自己分配,同时一定要有个明确的指针,否则自己都会找到不到,程序中的malloc, calloc, realloc等函数都是分配内存. 由小的空间向大的空间分配, 堆是从下向上分配.至于链表还在练习中
#include <stdio.h>#include<string.h>struct Student /*学生结构*/{ char cName[20]; //姓名 int iNumber; //学好 char cSex; //性别 int iGrade; //年纪}student;int main(){ struct Student*pStruct; //定义结构体指针 pStruct=&student; //指针指向结构体变量 strcpy(pStruct->cName,"SuYuQuan"); //将字符串常亮复制到成员变量中 pStruct->iNumber=12061212; //为成员变量赋值 pStruct->cSex=‘W‘; pStruct->iGrade=2; printf("----the student‘s information----\n"); //消息提示 printf("Name:%s\n",student.cName); //使用变量直接输出 printf("Number:%d\n",student.iNumber); printf("Sex:%c\n",student.cSex); printf("Grade:%d\n",student.iGrade); return 0; }
struct Student{ char cName[20]; int iNumber; char cSex; int iGrade;}student[5]={{"wangjiasheng",12062212,‘M‘,3}, {"yulongjiao",12062213,‘W‘,3}, {"zhangmeng",12062214,‘W‘,3}, {"jiangxuehuan",12062215,‘w‘,3}, {"hanliang",12062216,‘M‘,3}};int main(){ struct Student*pStruct; int index; pStruct=student; for (index=0; index<5; index++,pStruct++) { printf("NO%d student:\n",index+1); printf("Name:%s,Number:%d\n",(*pStruct).cName,pStruct->iNumber); printf("Sex:%c,Grade:%d\n",pStruct->cSex,pStruct->iGrade); printf("\n"); } return 0;}
struct Student{ char cName[20]; float fScore[3];}student={"suyuqun",98.5f,89.0,93.5f};void Display(struct Student* stu){ printf("------unformation------\n"); printf("Name:%s\n",stu->cName); printf("English:%.2f\n",stu->fScore[2]); stu->fScore[2]=90.0f;}int main(){ struct Student* pStruct=&student; Display(pStruct); printf("change english:%.2f\n",pStruct->fScore[2]); return 0;}
struct date{ int year; int month; int day;};struct student{ char name[30]; int num; char sex; struct date birthday;}student={"WangWei",12345678.,‘M‘,{1986,12,6}};int main(){ printf("-------information---------\n"); printf("Name:%s\n",student.name); printf("Number:%d\n",student.num); printf("Sex:%c\n",student.sex); printf("Brithday:%d,%d,%d\n",student.birthday.year, student.birthday.month, student.birthday.day); return 0;}
结构体的应用与理解.戴维营第九天
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