字符串转换成整数

 1 #include<iostream>
 2 using std::cout;
 3 
 4 
 5 int func(char *s){
 6     if(s==NULL) return -1;
 7     
 8     int num=0;
 9     while(*s!=''){
10         num = num*10 + *s - '0';//认真体会这条代码 
11         ++s;
12     }
13     
14     return num;
15 
16 }
17 
18 int main(){
19 //    char* m = NULL;
20     char n[] = "123450";
21     cout<<func(n);
22     return 0;
23 } 
原文地址:https://www.cnblogs.com/xuecl/p/12445444.html