#include <stdio.h>
#include <string.h>
 
#define ARR_SIZE  80 
main()
{                    
    char str[ARR_SIZE];
    int  len, i;
    int  letter=0,digit=0,space=0,other=0;
 
    printf("請輸入一個字串:");
    gets(str);
 
    len = strlen(str);    
 
    for (i=0; i<len; i++)
    {                    
        if (str[i]>='a'&&str[i]<='z' || str[i]>='A'&&str[i]<='Z')
        {                    
            letter ++;   
        }                
        else if (str[i]>='0'&&str[i]<='9')   
        {                    
            digit ++;      
        }            
        else if (str[i]==' ' )     
        {                   
            space ++;     
        }        
        else
            other ++;             
    }
 
    printf("英文字元數:%d\n", letter);
    printf("數字字元數:%d\n", digit);
    printf("空格數:%d\n", space);
    printf("其他字元數:%d\n", other);
}