统计英文字母、空格、数字和其它字符的个数

[c]代码库

#include "stdio.h"
main()
{
	char c;
	int letters=0,space=0,digit=0,others=0;
	printf ( "please input some characters\n" );
	while ( ( c=getchar() ) !='\n' )
	{
		if ( c>='a'&&c<='z'||c>='A'&&c<='Z' )
			letters++;
		else if ( c==' ' )
			space++;
		else if ( c>='0'&&c<='9' )
			digit++;
		else
			others++;
	}
	printf ( "all in all:char=%d space=%d digit=%d others=%d\n",letters,
	         space,digit,others );
}