jsp网站开发简单代码,网店代运营网,成都抖音代运营,刘强东当年做网站读的什么书2.函数传参:
2.1赋值传递#xff08;复制传递#xff09;函数体内部想要使用函数体外部变量值的时候使用复制传递2.2全局变量传递#include stdio.hint Num1 100;
int Num2 200;
int Ret 0;void Add(void)
{Ret Num1 Num2;return;
}int main(void)
{Add();printf…2.函数传参:
2.1赋值传递复制传递函数体内部想要使用函数体外部变量值的时候使用复制传递2.2全局变量传递#include stdio.hint Num1 100;
int Num2 200;
int Ret 0;void Add(void)
{Ret Num1 Num2;return;
}int main(void)
{Add();printf(Ret %d\n, Ret);return 0;
}
2.3地址传递函数体内部想要修改函数体外部变量值的时候使用地址传递示例1
#include stdio.hint SetNum(int *pTmp)
{*pTmp 100;return 0;
}int main(void)
{int Num 0;SetNum(Num);printf(Num %d\n, Num);return 0;
}示例2
#include stdio.hint Swap(int *px, int *py)
{int tmp 0;tmp *px;*px *py;*py tmp;return 0;
}int main(void)
{int Num1 100;int Num2 200;Swap(Num1, Num2);printf(Num1 %d, Num2 %d\n, Num1, Num2);return 0;
} 函数体内想修改函数体外指针变量值的时候传指针变量的地址即二级指针#include stdio.hint SetPoint(char **pptmp)
{*pptmp hello world;return 0;
}int main(void)
{char *p NULL;SetPoint(p);printf(p %s\n, p);return 0;
}
2.4整形数组传递int a[5] {1, 2, 3, 4, 5};int Fun(int parray[5]);int Fun(int parray[], int len);int Fun(int *parray, int len);示例1
#include stdio.h#if 0
int PrintArray1(int parray[5])
{int i 0;printf(sizeof:%ld\n, sizeof(parray));for (i 0; i 5; i){printf(%d , parray[i]);}printf(\n);return 0;
}int PrintArray2(int parray[], int len)
{int i 0;printf(sizeof:%ld\n, sizeof(parray));for (i 0; i len; i){printf(%d , parray[i]);}printf(\n);return 0;
}
#endifint PrintArray3(int *parray, int len)
{int i 0;for (i 0; i len; i){printf(%d , parray[i]);}printf(\n);return 0;
}int main(void)
{int a[5] {1, 2, 3, 4, 5};// PrintArray1(a);
// PrintArray2(a, 5);PrintArray3(a, 5);return 0;
}
示例2
#include stdio.hint Fun(int (*p)[3], int len)
{int i 0;int j 0;for (j 0; j len; j){for (i 0; i 3; i){printf(%d , p[j][i]);}printf(\n);}return 0;
}int main(void)
{int a[2][3] {1, 2, 3, 4, 5, 6};Fun(a, 2);return 0;
}
2.5字符型数组和字符串的传递char str[32] {hello world};int Fun(char *pstr);2.6二维数组传递
1整形二维数组传递int a[2][3] {1, 2, 3, 4, 5, 6};int Fun(int (*parray)[3], int len);
2字符型二维数组传递char str[5][32] {hello, world, how, are, you}; int Fun(char (*pstr)[32], int len);#include stdio.hint Fun(char (*pstr)[32], int len)
{int i 0;for (i 0; i len; i){printf(pstr[%d] %s\n, i, pstr[i]);}return 0;
}int FunPointArray(char **parray, int len)
{int i 0;for (i 0; i len; i){printf(parray[%d] %s\n, i, parray[i]);}return 0;
}int main(void)
{char str[5][32] {hello, world, how, are, you};char *a[5] {str[0], str[1], str[2], str[3], str[4]};int i 0;Fun(str, 5);FunPointArray(a, 5);return 0;
}
2.7指针数组传递char *pstr[5] {NULL};int Fun(char **ppstr, int len);2.8结构体传递 (1)结构体变量传递 struct student s;
int Fun(struct student tmp);
#include stdio.hstruct student
{char name[32];char sex;char age;int score;
};struct student GetStuInfo(void)
{struct student stu;gets(stu.name);scanf(%c, stu.sex);scanf(%d, stu.age);scanf(%d, stu.score);return stu;
}void PutStuInfo(struct student tmp)
{printf(姓名:%s\n, tmp.name);printf(性别:%c\n, tmp.sex);printf(年龄:%d\n, tmp.age);printf(成绩:%d\n, tmp.score);return;
}int main(void)
{struct student s;sGetStuInfoByPoint(s);PutStuInfo(s);return 0;
}2结构体指针传递 struct student s;
int Fun(struct student *ps);
#include stdio.hstruct student
{char name[32];char sex;char age;int score;
};int GetStuInfoByPoint(struct student *ps)
{gets(ps-name);scanf(%c, ps-sex);scanf(%d, ps-age);scanf(%d, ps-score);return 0;
}int PutStuInfoByPoint(struct student *ps)
{printf(姓名:%s\n, ps-name);printf(性别:%c\n, ps-sex);printf(年龄:%d\n, ps-age);printf(成绩:%d\n, ps-score);return 0;
}int main(void)
{struct student s;GetStuInfoByPoint(s);PutStuInfoByPoint(s);return 0;
}3结构体数组传递 struct student stu[3];
int Fun(struct student *pstu, int len);
#include stdio.hstruct student
{char name[32];char sex;int age;int score;
};int PrintStuInfo(struct student *pstu, int len)
{int i 0;for (i 0; i len; i){printf(姓名:%s\n, pstu[i].name);printf(性别:%c\n, pstu[i].sex);printf(年龄:%d\n, pstu[i].age);printf(成绩:%d\n, pstu[i].score);}return 0;
}int main(void)
{struct student stu[3] {{zhangsan, m, 19, 100},{lisi, f, 18, 90},{wanger, m, 17, 60},};PrintStuInfo(stu, 3);return 0;
}
