Questions about #c language # :

• You can see the answer to this question https://ask.csdn.net/questions/7659650 < / font > < / a > < / li > < li > this post is good also, You can see the < a href = "https://blog.csdn.net/qq_16135205/article/details/86770372?utm_source=csdn_ai_ada_ask_robot" target="_blank"> c ## link symbols use
• You can also look at c language -exp()

Look at this code:

#include
#include 
int main()
{    
    int count_num = 0, count_ABC = 0, count_abc = 0, count_others = 0;    
    int i = 0;    
    char str[255];    
    scanf("%s", &str);    
    i = 0;    
    while (str[i])
    {
        printf("%c", str[i]);
        int ASC = str[i];        
        if (ASC >= 65 && ASC <= 90)//大写字母            
        count_ABC++;        
        else if (ASC >= 97 && ASC <= 122)//小写字母            
        count_abc++;        
        else if (ASC >= 48 && ASC <= 57)//数字            
        count_num++;        else            
        count_others++;        
        i++;
    }    
    printf("大写字母个数:%d\n小写字母个数：%d \n数字个数：%d\n 其他：%d\n", count_ABC, count_abc, count_num, count_others);    
    return 0;
}

scanf cannot enter Spaces, so getchar does it instead.