编写一个函数，由实参传来一个字符串，统计此字符串中字母，数字，空格和其他字符的个数。在主函数中输入字符串以及输出上述结果。

#include <stdio.h>

int letter=0,digit=0,space=0,other=0;                        //定义全局变量

int Tong(char *ch);                                                            //函数声明

int main(void)

{

       char ch[20],k;

       gets(ch);

       Tong(ch);                                                             //进入Tong函数，将ch的首地址传给Tong;

       printf("字母=%d 数字=%d 空格=%d 其他字符%d",letter,digit,space,other);

       return 0;

}

int Tong(char *ch)

{

       int i;

       while(ch[i]!='\0')

       {

              if(ch[i]>='a'&&ch[i]<='z'||ch[i]>='A'&&ch[i]<='Z')                     //如果是字母，letter+1；

                     letter+=1;

              else if(ch[i]>='0'&&ch[i]<='9')                          //如果是数字，digit+1；                           

                            digit+=1;

              else if(ch[i]==' ')                            //如果是空格space+1；

                            space+=1;

              else                                           //如果是其他字符other+1；

                     other+=1;

              i++;      

       }

 }

标签：ch,函数,Tong,space,int,char,other,字符串,实参
来源： https://blog.csdn.net/ChenYijia_123/article/details/121451864