C_使用switch语句
源码:
# include <stdio.h>
int main()
{
int num;
/* 下面定义的各变量，分别代表个位，十位，百位，千位，万位，十万位以及位数 */
int indiv, ten, hundred, thousand;
int ten_thousand, hundred_thousand, place;
printf("请输入一个整数(0～999999)：");
scanf("%d", &num);
/* 判断变量num的位数 */
if(num > 99999)
place = 6;
else if(num > 9999)
place = 5;
else if(num > 999)
place = 4;
else if(num > 99)
place = 3;
else if(num > 9)
place = 2;
else
place = 1;
printf("place = %d\n", place);
printf("每位数字为：");
/* 求出num在各位上的值 */
hundred_thousand = num/100000;
ten_thousand = (num - hundred_thousand*100000)/10000;
thousand = (num - hundred_thousand*100000 - ten_thousand*10000)/1000;
hundred = (num - hundred_thousand*100000 - ten_thousand*10000
- thousand*1000)/100;
ten = (num - hundred_thousand*100000 - ten_thousand*10000
- thousand*1000 - hundred*100)/10;
indiv = num - hundred_thousand*100000 - ten_thousand*10000
- thousand*1000 - hundred*100 - ten*10;
/* 判断变
相关文档：
内存分配方式有三种：
（1） 从静态存储区域分配。内存在程序编译的时候就已经分配好，这块内存在程序的
整个运行期间都存在。例如全局变量，static 变量。
（2） 在栈上创建。在执行函数时，函数内局部变量的存储单元都可以在栈上创建，函
数执行结束时这些存储单元自动被释放。栈内存分配运算内置于处理器的指令� ......
源码:
# include <stdio.h>
int main()
{
int i, j, k;
int m, n, p;
i = 8;
j = 10;
k = 12;
/* 自增在操作数之前 */
......
源码:
# include <stdio.h>
int main()
{
/* 定义一个整形指针p */
int *p;
int begin, end;
begin = 10;
/* 给指针p赋初值 */
p = &begin;
& ......
源码:
# include <stdio.h>
int main()
{
int x, y, z, mid, dec;
printf("请任意输入三个整数：\n");
scanf("%d %d %d", &x, & ......
源码:
# include <stdio.h>
int main()
{
int x, y;
printf("请输入自变量x：");
scanf("%d", &x);
if(x < 6)
{
......
