package myAtoi8;
/*
* Implement atoi to convert a string to an integer.
Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the possible input cases.
Notes: It is intended for this problem to be specified vaguely (ie, no given input specs). You are responsible to gather all the input requirements up front.
Update (2015-02-10):
The signature of the C++ function had been updated. If you still see your function signature accepts a const char * argument, please click the reload button to reset your code definition.
*/ public class Solution {
public static int myAtoi(String str) {
StringBuilder sb=new StringBuilder();
int flag=0;
if(str.length()==0)
return 0;
else{
for(int i=0;i<str.length();i++){
if(str.charAt(i)<'0'||str.charAt(i)>'9')
if(str.charAt(i)=='0'||str.charAt(i)==' ')
if (sb.length()==0)
continue;
else
break;
else if (str.charAt(i)=='-')
if (flag==0){
flag=-1;
sb.append('0');
}
else
break;
else if (str.charAt(i)=='+')
if (flag==0){
flag=1;
sb.append('0');
}
else
break;
else
break;
else
sb.append(str.charAt(i));
}
}
if(sb.length()==0)
return 0;
else if(sb.length()>12)
str=sb.substring(sb.length()-12);
else
str=sb.toString();
if (flag==-1)
str="-"+str;
long result=Long.parseLong(str);
System.out.println(result);
if (result>2147483647)
return 2147483647;
else if (result<-2147483648)
return -2147483648;
else
return (int)result; }
public static void main(String[] args){
String str1="";//
String str2="+";//
String str3=" +45555";//
String str4=" -45555";//-45555
String str5="2147483647";//
String str6="2147483648";//
String str7="+-2";//
String str8="-+2";//
String str9="++2";//
String str10="-2147483648";//-2147483648
String str11=" - 321";//
String str12=" -11919730356x";//-2147483648
String str13="1234567890123456789012345678901234567890";//
System.out.println(myAtoi(str1));
System.out.println(myAtoi(str2));
System.out.println(myAtoi(str3));
System.out.println(myAtoi(str4));
System.out.println(myAtoi(str5));
System.out.println(myAtoi(str6));
System.out.println(myAtoi(str7));
System.out.println(myAtoi(str8));
System.out.println(myAtoi(str9));
System.out.println(myAtoi(str10));
System.out.println(myAtoi(str11));
System.out.println(myAtoi(str12));
System.out.println(myAtoi(str13)); }
}

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