iOS开发-Day12-C的复习

来源：互联网发布：云天明知乎编辑：程序博客网时间：2024/06/04 18:14

今天并没有怎么复习，但是对部分知识点做了一下回顾，还是发现了不少漏洞

1、定义数组时

static int arr[10];//数组中所有值为0int arr[10];//数组中值随机int arr[10]={0};//数组中所有值为0int arr[10]={1};//数组中初第一个元素都为0

2、switch的参数可以为int、 short、 char 或者 byte，还有enum

3、关于const和宏定义的区别并没有掌握，详细见day9

今天改进了万年历，更好看了一点，嘿嘿嘿

void wannianli(int year,int month,int day){    int runyear=0,daycount=0;    int allmonth[2][13]={{0,31,28,31,30,31,30,31,31,30,31,30,31},{0,31,29,31,30,31,30,31,31,30,31,30,31}};    if ((year%4==0&&year%100!=0)||year%400==0) {        runyear=1;    }    for (int i=1; i<=month; i++) {        daycount+=allmonth[runyear][i-1];    }     //daycount+=day;//一年中第几天     //printf("%d \n",daycount);     //printf("%d",year-1 + (year-1)/4 - (year-1)/100 + (year-1)/400);    int monthweek[allmonth[runyear][month]];    for (int i=0; i<allmonth[runyear][month]; i++) {        monthweek[i]=(year-1 + (year-1)/4 - (year-1)/100 + (year-1)/400 + daycount+i+1)%7;    }    printf("% d.%d\n",year,month);    printf("日\t一\t二\t三\t四\t五\t六\t\n");    if (monthweek[0]!=0) {        for (int i=0; i<monthweek[0]; i++) {            printf("\t");        }    }    for (int i=0; i<allmonth[runyear][month]; i++) {        if (monthweek[i]==0) {            monthweek[i]+=7;        }        printf("%d\t",i+1);        if ((monthweek[i])%6==0) {            printf("\n");        }    }    printf("\n\n");}nt main(int argc, const char * argv[]) {    @autoreleasepool {        wannianli(2015,7,24);        wannianli(2015,8,24);        wannianli(2015,9,24);    }    return 0;}

输出结果

是不是好看了很多

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