diff --git a/atoi_2.0 b/atoi_2.0
new file mode 100755
index 0000000..155f632
Binary files /dev/null and b/atoi_2.0 differ
diff --git a/atoi_2.0.c b/atoi_2.0.c
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--- /dev/null
+++ b/atoi_2.0.c
@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include <string.h>
+int myatoi(char *s, int l, int base);
+int main(int argc, char **argv)
+{
+	printf("Print your string number\n");
+	char s[100]; scanf("%s", s);
+	printf("Enter your string number base\n");
+	int base;
+	scanf("%d", &base);
+	printf("Your converted number is %d\n",  myatoi(s, strlen(s), base));
+	return 0;
+}
+int myatoi(char *s, int l, int base) 
+{	
+	int result = 0;
+	int is_pos = 1;
+	int symb;
+	int d;
+	for(int i=0; i < l; i++)
+	{
+		symb = (int)s[i];
+		if((int)s[i]=='-')
+			{
+				is_pos = -1;
+			}
+		else if(base <= 10)
+			{
+				if((int)s[i] < '0' || (int)s[i] > '9')
+				{
+					printf("Not a number\n");
+					result = 0;
+					break;
+				}	
+				result = result * base + ((int)s[i] - '0');
+			}
+		else
+			{
+				if (symb >= '0' && symb <= '9') 
+				{
+					d = symb - '0';
+				}
+				else if (symb >= 'A' && symb <= 'Z') 
+				{
+					d = symb - 'A' + 10;
+				} 
+				else if (symb >= 'a' && symb <= 'z') 
+				{
+					d = symb - 'a' + 10;
+				}
+				result = result * base + d;
+			}
+        
+	}
+	result = result * is_pos;
+	return result;
+}