c语言计算星期几、万年历系统

#include <stdio.h> #include <windows.h> int integer_detection(char ch) //判断字符是否为数字 { if(ch>='0'&&ch<='9') return 1; else return 0; } int Date_input_detection(char date[]) //判断日期格式 { int i=0; if(date[4]=='-') { if(date[7]=='-') { while(i<10) { if(i==4||i==7) { i++; continue; } if(i==9) { if(date[i]=='\0') { //****************** if(date[5]!='0'&&date[5]!='1') return 0; if(date[5]=='1') { if(date[6]>'2') return 0; } //***************** //以上为判断月份是否超过12，若超过12则为输入错误 return 1; } } if(integer_detection(date[i])==1) i++; else return 0; } //**************************************** if(date[5]!='0'&&date[5]!='1') return 0; if(date[5]=='1') { if(date[6]>'2') return 0; } if(date[8]!='2'&&date[8]!='1'&&date[8]!='3'&&date[8]!=0) return 0; if(date[8]=='3') { if(date[9]!='1'&&date[9]!='0') return 0; } if(date[5]=='0') { if(date[6]=='2') { if(date[8]>'2') return 0; } } //*********************************** //以上为判断日期是否超出正常值 return 1; } else if(date[6]=='-') { while(i<9) { if(i==4||i==6) { i++; continue; } if(i==8) { if(date[i]=='\0') { return 1; } } if(integer_detection(date[i])==1) i++; else return 0; } if(date[5]=='2') { if(date[7]>'2') return 0; } return 1; } } } void translation_date(char date[],int *year,int *month,int *day) //翻译日期 { int tmp=0; tmp=tmp+(date[0]-'0')*1000; tmp=tmp+(date[1]-'0')*100; tmp=tmp+(date[2]-'0')*10; tmp=tmp+(date[3]-'0'); *year=tmp; tmp=0; if(date[6]=='-') { tmp=date[5]-'0'; *month=tmp; tmp=0; if(date[9]=='\0') { tmp=tmp+(date[7]-'0')*10; tmp=tmp+(date[8]-'0'); *day=tmp; tmp=0; } else if(date[8]=='\0') { tmp=tmp+(date[7]-'0'); *day=tmp; tmp=0; } } else if(date[7]=='-') { tmp=tmp+(date[5]-'0')*10; tmp=tmp+(date[6]-'0'); *month=tmp; tmp=0; if(date[9]=='\0') { tmp=tmp+(date[8]-'0'); *day=tmp; tmp=0; } else if(date[10]=='\0') { tmp=tmp+(date[8]-'0')*10; tmp=tmp+(date[9]-'0'); *day=tmp; tmp=0; } } } int determine_leap_year(int year) //判断是否闰年 { if(year%100==0) { if(year%400==0) return 1; } else if(year%4==0) { return 1; } else { return 0; } } int Number_of_days_in_February(int run) //返回二月份天数 { switch(run) { case 0: { return 28; } case 1: { return 29; } } } int Week_translation(int year,int month,int day) { int parameter1=0; int parameter2=0; int parameter3=0; int parameter4=0; int parameter5=0; int parameter6=0; int month1=0,year1=0,day1=0; int week=0; if(month!=1&&month!=2) { month1=month; year1=year; } else if(month==1) { month1=13; year1=year-1; } else if(month==2) { month1=14; year1=year-1; } parameter1=year1/100/4; parameter2=year1/100*2; parameter3=year1%100; parameter4=parameter3/4; parameter5=13*(month1+1)/5; parameter6=day-1; week=(parameter1-parameter2+parameter3+parameter4+parameter5+parameter6)%7; return week; } void put_week(int week,char date[]) { switch(week) { case 0: { printf("%s是星期天\n",date); break; } case 1: { printf("%s是星期一\n",date); break; } case 2: { printf("%s是星期二\n",date); break; } case 3: { printf("%s是星期三\n",date); break; } case 4: { printf("%s是星期四\n",date); break; } case 5: { printf("%s是星期五\n",date); break; } case 6: { printf("%s是星期六\n",date); break; } } } void calendar_year() //查询年历 { int year; int week; int tmp1=0,run; int i=0,j=0; int February; printf("请输入要查找的年份（如：2012）："); scanf("%d",&year); run=determine_leap_year(year); February=Number_of_days_in_February(run); while(tmp1<12) { printf(" %d月\n",tmp1+1); printf(" "); for(j=0;j<7;j++) { switch(j) { case 0: { printf("日 "); break; } case 1: { printf("一 "); break; } case 2: { printf("二 "); break; } case 3: { printf("三 "); break; } case 4: { printf("四 "); break; } case 5: { printf("五 "); break; } case 6: { printf("六 "); break; } } } i=0; j=0; printf("\n"); if(tmp1==0) week=Week_translation(year,1,1); for(j=0;j<week;j++) { printf(" "); } switch(tmp1) { case 0:j=31;break; case 1:j=February;break; case 2:j=31;break; case 3:j=30;break; case 4:j=31;break; case 5:j=30;break; case 6:j=31;break; case 7:j=31;break; case 8:j=30;break; case 9:j=31;break; case 10:j=30;break; case 11:j=31;break; } i=0; while(i<j) { printf("%4d",i+1); week++; if(week%7==0) printf("\n"); i++; } week=week%7; printf("\n"); tmp1++; } } int main() { int year,month,day; int tmp=0; int run=0; int February; int week; char date[10]; int ch; do{ do{ printf("==================欢迎使用日历查询系统===============\n"); printf(" 1.日期查询星期几 2.查询年历\n"); printf(" 0.退出\n"); printf(" 请输入命令："); scanf("%d",&ch); fflush(stdin); }while(ch!=1&&ch!=2&&ch!=0); tmp=0; switch(ch) { case 1: { do{ if(tmp) { printf("输入错误，请重新输入日期！\n"); } printf("请输入一个日期（如：1990-01-01）："); gets(date); tmp++; }while(Date_input_detection(date)==0); tmp=0; translation_date(date,&year,&month,&day); run=determine_leap_year(year); February=Number_of_days_in_February(run); tmp=0; switch(month) { case 12:tmp=tmp+30; case 11:tmp=tmp+31; case 10:tmp=tmp+30; case 9:tmp=tmp+31; case 8:tmp=tmp+31; case 7:tmp=tmp+30; case 6:tmp=tmp+31; case 5:tmp=tmp+30; case 4:tmp=tmp+31; case 3:tmp=tmp+February; case 2:tmp=tmp+31; case 1:tmp=tmp+day; } printf("\n%s是%d年的第%d天\n",date,year,tmp); week=Week_translation(year,month,day); put_week(week,date); system("pause"); system("cls"); break; } case 2: { calendar_year(); system("pause"); system("cls"); break; } case 0:break; } }while(ch!=0); }