C language writes a function that converts a numeric string to a number corresponding to the string (including a positive integer, a negative integer).

/* Write a function that converts a numeric string to a number corresponding to the string (including positive integers, negative integers <span style= "font-family:arial, Helvetica, Sans-serif;") >) </span>

<span style= "font-family:arial, Helvetica, Sans-serif;" > Example: "12</span>"  return

"-123" return-123 function prototype: int my_atoi (char *str) {}*/#include <stdio.h>int my_atoi (char *str) {int N=0;int sum=0;if (*str== '-') {str++;n=1;} while ((*STR) <= ' 9 ' && (*str) >= ' 0 ') {sum=sum*10+ ((int) (*STR) -48); str++;} if (n==1) {sum=-sum;} return sum;} int main () {char p[]= " -123456";p rintf ("%d\n", My_atoi (p)); return 0;}

C language writes a function that converts a numeric string to a number corresponding to the string (including a positive integer, a negative integer).