8

src/8.c

@@ -0,0 +1,58 @@
+// This file is generated by mkfile.py
+// Date: 2026-06-25
+
+#include <solution/8.h>
+
+#include <limits.h>
+#include <stdbool.h>
+int myAtoi(char *s)
+{
+    long ret = 0;
+    int length = 0;
+    bool isPos = true;
+    bool hasSign = false;
+    bool hasDigit = false;
+    bool hasSpace = true;
+
+    for (; *s != '\0' && length < 11; s++)
+    {
+        // step 1 skip space
+        if (hasSpace)
+        {
+            if (*s == ' ')
+                continue;
+            hasSpace = false;
+        }
+        // step 2 check is sign while has no number
+        if (!hasDigit && !hasSign && (*s == '-' || *s == '+'))
+        {
+            hasSign = true;
+            isPos = *s == '+';
+            continue;
+        }
+        // step 3 read num
+        if (*s - '0' >= 0 && *s - '9' <= 0)
+        {
+            hasDigit = true;
+            // check if front zero
+            if (length == 0 && *s == '0')
+                continue;
+
+            // not front zero
+            if (length > 0)
+                ret *= 10;
+            ret += *s - '0';
+            length++;
+            continue;
+        }
+        // step 4 check char
+        break;
+    }
+
+    if (isPos)
+        ret = ret > INT_MAX ? INT_MAX : ret;
+    else
+        ret = ret * -1 < INT_MIN ? INT_MIN : ret * -1;
+
+    return (int)ret;
+}