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.

#include int len(char *sp){ int num = 0; while(*sp++ != 0){ if(*sp != ' ')num++; } return num; } int main(void) { char *s = "fasf sf s"; printf("%d", len(s)); }