C语言库atof()函数

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main () {
   float val;
   char str[20];

   strcpy(str, "98993489");
   val = atof(str);
   printf("String value = %s, Float value = %f/n", str, val);

   strcpy(str, "yiibai.com");
   val = atof(str);
   printf("String value = %s, Float value = %f/n", str, val);

   return(0);
}