使用c语言编写程序

#include "stdio.h"
#include "conio.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);
getch();
}

#include<stdio.h>
main()
{
char c=0;
int Space,Tables,Letters,Others,Numbers;
Space=Tables=Letters=Others=Numbers=0;

while(c!='\n')
{
if(((c<='z')&&(c>='a'))||((c<='Z')&&(c>='A'))) Letters++;
else if(c=='\t') Tables++;