C-Determine the day of the week according to the first letter

1#include <stdio.h>2#include <ctype.h>3 4 /*5 Please enter the first letter of the day of the week to determine the day of the week, if the first letter, then continue to judge the second letter. 6 */7 8 //custom get characters that are not case sensitive.9 intTen Get_char () { One     returnToLower (GetChar ()); A } -  - void the What_day () { -     Chartmp//the character to be judged. -TMP =Get_char (); -     Switch(TMP) { +          Case 'm': -printf"Monday \ n"); +              Break; A          Case 'T'://start with ' t ' and analyze further. atprintf"Enter a second character to determine:"); -GetChar ();//line breaks are ignored. -TMP = Get_char ();//for multiple if judgments, save the character to be judged first, not in the If with ' Get_char () ', because each call will fetch a different value. -             if(TMP = ='u') -printf"Tuesday \ n"); -             Else if(TMP = ='h') inprintf"Thursday \ n"); -             Else toprintf"not this week ."); +              Break; -          Case 'W': theprintf"Wednesday \ n"); *              Break; $          Case 'F':Panax Notoginsengprintf"Friday \ n"); -              Break; the          Case 's'://starting with ' s ', further analysis. +printf"Enter a second character to determine:"); AGetChar ();//line breaks are ignored. theTMP =Get_char (); +             if(TMP = ='u') -printf"Sunday \ n"); $             Else if(TMP = ='a') $printf"Saturday \ n"); -             Else -printf"not this week ."); the              Break; -     default:Wuyiprintf"not this week ."); the          Break; -     } Wu}

C-Determine the day of the week according to the first letter