The numeric string is converted to the number corresponding to the string.

Write a function that converts a numeric string to a number corresponding to the string (including positive floating-point numbers, negative floating-point numbers)

For example:"12.34 " returns 12.34

" -123.34" returns -123.34

function prototype:double my_atof (char *str)

#include <stdio.h> #include <math.h> #include <ctype.h>double my_atof (char *str) {int flag = 1;double Value = 0;int count = 0;while (Isspace (*str)) {    str++;} Skip all spaces if (*str = = '-') {    flag =-1;    str++;} if (*str = = ' + ') {    str++;} isdigtil//the positive and negative while (*str! = ')} {    if (*str = = '. ')    {        count++;        str++;        Continue;    } Judge the decimal        if (count)    {        count *=10;    } Count is to remember the number of times the decimal point is moved    value = value * + (*STR-' 0 ');//Multiply by 10 of the Count of    str++;}    Value = value/count;//then remove return flag * (value);} int main () {    char *p = " -12.34"; printf ("%f\n", My_atof (P));}

Write a function that converts a numeric string to a number corresponding to that string (including positive integers, negative integers)

For example:" 12" returns

" -123" returns -123

function Prototypes:int my_atof (char *str)

The numeric string is converted to the number corresponding to the string.