The "C language" writes a function that converts a numeric string to a number corresponding to the string (including positive floating-point numbers, negative floating-point numbers)

Write a function that converts a numeric string to a number corresponding to the string (including a positive floating point, a negative float)//For example: "12.34"  returns 12.34.   "   -12.34 "  back to 12.34#include<stdio.h>  #include <math.h>  #include <assert.h>double my_ Atof (char *str)  {        int flag=0;       int count = 0;      int ret = 1;      Double sum = 0;assert (NULL!=STR);     while (*str! = ')      } {           if (*str = = '-')         {            ret =-1;            str++;         }         if (*str = = '. ')         {             flag = 1;             STR + +;         }         if (*str >= ' 0 ' && *str <= ' 9 ')         {           sum = sum*10 + (*str-' 0 ');                      if (flag = = 1)           {             count + +;           }         }         str++;      }       sum = Sum/pow (10,count);       return ret*sum;  }  int main ()  {     char p[]= " -52.36";       printf ("%f\n", My_atof (p));     return 0;  }

The "C language" writes a function that converts a numeric string to a number corresponding to the string (including positive floating-point numbers, negative floating-point numbers)