C语言输入一个星期的首字母 输出星期几

C语言输入一个星期的首字母 输出星期几

#include
  int main(void)
  {
  	char i,j;
  	printf("please input first character:");
  	scanf("%c",&i);
  	if(i=='m'||i=='M')
  	{
  		printf("Monday");
	  }
	else if(i=='w'||i=='W')
	{
		printf("Wednesday");
	}
	else if(i=='f'||i=='F')
	{
		printf("Friday");
	}
	else if(i=='t'||i=='T')
	{
		printf("please input second character:");
		scanf(" %c",&j);//这里%c前面要加一个空格，就能忽略第一次输入的回车 
		if(j=='u'){
			printf("Tuesday");
		}
	    else if(j=='h'){
			printf("Thursday");
		}
		else printf("illegal input!");
	}
	else if(i=='s'||j=='S')
	{
	    printf("please input second character:");
		scanf(" %c",&j);
		if(j=='a'){
			printf("Saturday");
		}
		else if(j=='u'){
			printf("Sunday");
		}
		else printf("illegal input!");
	}
   }