exp07_03.c

《C语言程序设计教程、实验与练习》 源文件下载

#include <stdio.h>

void main()
{
 char  str[200];
 int  count[3]={0};
 char *pstr;
 char ch;

 gets(str);
 pstr=str;
 while(*pstr!=0)
 {
  ch=*pstr;
  ch=toupper(ch);

  if(ch>='A'&&ch<='Z')
    count[0]++;
  else if(ch>='0'&&ch<='9')
    count[1]++;
  else
    count[2]++;
  pstr++;
   }//while
 printf("this string contains %d letters,\
  %d digits and %d other characters\n",
  count[0],count[1],count[2]);
 }