參考：http://edu.51cto.com/roadmap/view/id-59.html
8.讀取輸入
8.1 可以使用scanf 函數來讀取輸入
8.2 實例
#include <stdio.h>
int main(void)
{
int pid;
int age;
float salary;
char name[10];
printf("請輸入pid:\n");
//輸入pid
scanf("%d",&pid);
printf("請輸入age:\n");
//輸入age
printf("請輸入age:\n");
scanf("%d",&age);
//輸入salary
printf("請輸入salary:\n");
scanf("%d",&salary);
//輸入name
printf("請輸入name:\n");
scanf("%d",&name);
printf("pid=%d,age=%d,salary=%.2f,name=%s",pid,age,salary,name)
return 0;
}