C学习01

  1 char b[7][10]={"sunday","monday","tuesday","wednesday","thursday","friday","satruday"};
  2 static char c[7][10]={"sunday","monday","tuesday","wednesday","thursday","friday","saturday"};//static限制只能在本文件中使用
  3 char* week(int n,int i)
  4 {
  5     return b[n];
  6 };
  7
  8 char* staticweek(int n)
  9 {
 10     return c[n];
 11 };

#include <stdio.h>

extern char w[7][10];//extern可以置于变量或者函数前，表示变量或者函数的定义在别的文件中，提示编译器遇到此变量和函数时在其他模块中寻找>其定义，extern也可以用来进行连接指定
extern char b[7][10];//连接了01_1.c文件
char* week(int);
char* staticweek(int);
char* weekday(int n)
{
        return w[n];
}
int main()
{
    printf("%s\n",weekday(3));
    printf("%s\n",week(5));
    printf("%s\n",b[3]);
    printf("%s\n",staticweek(6));
    return 0;
}
char w[7][10]={"星期日","星期一","星期二","星期三","星期四", "星期五","星期六"};