编写程序，求字符串长度（指针专题）。编写一函数len，求一个字符串的长度，注意该长度不计空格。要求用字符指针实现。在主函数中输入字符串，调用该len函数后输出其长度。 int len(char *s

#include<stdio.h>

int len(char* sp)

{

         int count = 0;

         for (int i = 0;; i++)

         {

                   if (*(sp + i) == ' ')

                            continue;

                   if (*(sp + i) == '\0')

                            break;

                   count++;

         }

         return count;

}

int main() {

         int i;

         char ch[100];

         for (i = 0;; i++)

         {

                   scanf("%c", &ch[i]);

                   if (ch[i] == '\n') {

                            ch[i] = '\0';

                            break;

                   }

         }

         int lea = len(ch);

         printf("%d", lea);

         return 0;

}