ex22_main.c

#include "ex22.h"
#include "dbg.h"

const char *MY_NAME="Zed A. Shaw";

void scope_demo(int count)
{
    log_info("count is:%d",count);
    if(count>10){            //在if语句里的count与在外面的count不同
        int count=100;
        log_info("count in this scope is %d",count);
    }
    log_info("count is at exit:%d",count);
    count=3000;
    log_info("count after assign:%d",count);
}

int main(int argc,char *grgv[])
{
    // test out THE_AGE accessors
    log_info("My name:%s,age:%d",MY_NAME,get_age());
    set_age(100);
    log_info("My age is now:%d",get_age());

    // test out THE_SIZE extern
    log_info("THE_SIZE is:%d",THE_SIZE);
    print_size();
    THE_SIZE=9;
    log_info("THE_SIZE is now:%d",THE_SIZE);
    print_size();

    // test the ratio function static
    log_info("Ratio at first:%f",update_ratio(2.0));
    log_info("Ratio again:%f",update_ratio(10.0));      //明显看出update_ratio里的ratio没有被销毁，依然存在
    log_info("Ratio once more:%f",update_ratio(300.0));

    // test the scope demo
    int count=4;                   //最后输出的count依然是4
    scope_demo(count);
    scope_demo(count*20);
    log_info("count after calling scope_demo:%d",count);

    return 0;
}