Create String to integer(atoi).java

Author: Ayushi2202

leetcode/java/linkedlist/String to integer(atoi).java

@@ -0,0 +1,27 @@
+class Solve {
+    public int myAtoi(String str) {
+        int i = 0;
+        int sign = 1;
+        int result = 0;
+        if (str.length() == 0) return 0;
+
+        
+        while (i < str.length() && str.charAt(i) == ' ')
+            i++;
+
+        
+        if (i < str.length() && (str.charAt(i) == '+' || str.charAt(i) == '-'))
+            sign = (str.charAt(i++) == '-') ? -1 : 1;
+
+        
+        while (i < str.length() && str.charAt(i) >= '0' && str.charAt(i) <= '9') {
+            if (result > Integer.MAX_VALUE / 10 ||
+                    (result == Integer.MAX_VALUE / 10 && str.charAt(i) - '0' > Integer.MAX_VALUE % 10)) {
+                return (sign == 1) ? Integer.MAX_VALUE : Integer.MIN_VALUE;
+            }
+            result = result * 10 + (str.charAt(i++) - '0');
+        }
+        return result * sign;
+
+    }
+}