diff --git a/README.md b/README.md
new file mode 100644
index 0000000..a4681d6
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# TinyCRC
+
+This is a library for calculating CRC32, CRC16 and CRC8.
\ No newline at end of file
diff --git a/crctest.cpp b/crctest.cpp
index db0ed5e..c29935e 100644
--- a/crctest.cpp
+++ b/crctest.cpp
@@ -4,41 +4,33 @@
 #include <cstring>
 #include "src/tinycrc.h"
 
+void test(const uint8_t* buffer)
+{
+    uint32_t crc32 = tinycrc_crc32(buffer, strlen((char*)buffer));
+    uint16_t crc16 = tinycrc_crc16(buffer, strlen((char*)buffer));
+    uint8_t crc8 = tinycrc_crc8(buffer, strlen((char*)buffer));
 
+    printf("%-32s | crc32 | %08x\n", (char*)buffer, crc32);
+    printf("%-32s | crc16 |     %04x\n", (char*)buffer, crc16);
+    printf("%-32s | crc8  |       %02x\n", (char*)buffer, crc8);
+
+}
 
 int main()
 {
     uint8_t* buffer = (uint8_t*)malloc(32);
 
-    sprintf((char*)buffer, "Hello %s!", "World");
+    strcpy((char*)buffer, "Hello World\0");
+    test(buffer);
 
-    uint32_t crc32 = tinycrc_crc32(buffer, 32);
-    uint16_t crc16 = tinycrc_crc16(buffer, 32);
-    uint8_t crc8 = tinycrc_crc8(buffer, 32);
+    strcpy((char*)buffer, "Hello World!\0");
+    test(buffer);
 
-    printf("%-32s | crc32 | %08x\n", (char*)buffer, crc32);
-    printf("%-32s | crc16 |     %04x\n", (char*)buffer, crc16);
-    printf("%-32s | crc8  |       %02x\n", (char*)buffer, crc8);
+    strcpy((char*)buffer, "Hello Worlds\0");
+    test(buffer);
 
-    sprintf((char*)buffer, "Hello %s!", "Worlds");
-
-    crc32 = tinycrc_crc32(buffer, 32);
-    crc16 = tinycrc_crc16(buffer, 32);
-    crc8 = tinycrc_crc8(buffer, 32);
-
-    printf("%-32s | crc32 | %08x\n", (char*)buffer, crc32);
-    printf("%-32s | crc16 |     %04x\n", (char*)buffer, crc16);
-    printf("%-32s | crc8  |       %02x\n", (char*)buffer, crc8);
-
-    sprintf((char*)buffer, "%s %d", "foobarxyzzy", 42);
-
-    crc32 = tinycrc_crc32(buffer, 32);
-    crc16 = tinycrc_crc16(buffer, 32);
-    crc8 = tinycrc_crc8(buffer, 32);
-
-    printf("%-32s | crc32 | %08x\n", (char*)buffer, crc32);
-    printf("%-32s | crc16 |     %04x\n", (char*)buffer, crc16);
-    printf("%-32s | crc8  |       %02x\n", (char*)buffer, crc8);
+    strcpy((char*)buffer, "Testing\0");
+    test(buffer);
 
     free(buffer);