diff --git a/example/c/Makefile b/example/c/Makefile
index 745086d..f3019a4 100644
--- a/example/c/Makefile
+++ b/example/c/Makefile
@@ -1,4 +1,4 @@
 all:
-	$(CC) -g -Wall -pedantic testzmat.c -o testzmat -DNO_LZMA -DNO_LZ4 -I../../src -L../../lib -lzmat -lz
+	$(CC) -g -Wall -pedantic testzmat.c -o testzmat -DNO_LZMA -DNO_LZ4 -I../../include -L../../lib -lzmat -lz
 clean:
 	-rm -f testzmat
diff --git a/example/c/testzmat.c b/example/c/testzmat.c
index 528a1e7..8a1eda2 100644
--- a/example/c/testzmat.c
+++ b/example/c/testzmat.c
@@ -1,5 +1,5 @@
 /***************************************************************************//**
-**  \mainpage ZMat - A portable C-library and MATLAB/Octave toolbox for inline data compression 
+**  \mainpage ZMat - A portable C-library and MATLAB/Octave toolbox for inline data compression
 **
 **  \author Qianqian Fang <q.fang at neu.edu>
 **  \copyright Qianqian Fang, 2019-2020
@@ -15,73 +15,88 @@
 #include <string.h>
 
 /**
-  * if only zlib/gzip/base64 is used, one only need to add -I/path/to/zmatlib.h 
+  * if only zlib/gzip/base64 is used, one only need to add -I/path/to/zmatlib.h
   * if lzma/lzip is used, one must add -I/path/to/src/easylzma/
   * if lz4/lz4hc is used, one must add -I/path/to/src/lz4
   */
 
 #include "zmatlib.h"
 
-int main(void){
-    char *test[]={"__o000o__(o)(o)__o000o__ =^_^=  __o000o__(o)(o)__o000o__"};
-    
-    int ret=0, status=0;
+int main(void) {
+    char* test[] = {"__o000o__(o)(o)__o000o__ =^_^=  __o000o__(o)(o)__o000o__"};
+
+    int ret = 0, status = 0;
     size_t compressedlen, encodedlen, decodelen, decompressedlen;
 
     /*output buffers will be allocated inside zmat functions, host is responsible to free after use*/
-    unsigned char *compressed=NULL, *encoded=NULL, *decoded=NULL, *decompressed=NULL;
+    unsigned char* compressed = NULL, *encoded = NULL, *decoded = NULL, *decompressed = NULL;
 
     /*=====================================*/
     /* compressing and encoding the string */
     /*=====================================*/
-    
+
     /*first, perform zlib compression use the highest compression (-9); one can use zmat_encode as well*/
-    ret=zmat_run(strlen(test[0]),(unsigned char*)test[0], &compressedlen, &compressed, zmZlib, &status, -9);
-    if(ret==0){
+    ret = zmat_run(strlen(test[0]), (unsigned char*)test[0], &compressedlen, &compressed, zmZlib, &status, -9);
+
+    if (ret == 0) {
         /*next, encode the compressed data using base64*/
-        ret=zmat_encode(compressedlen,compressed, &encodedlen, &encoded, zmBase64, &status);
-	if(ret==0){
-		printf("{\n\t\"original\":\"%s\",\n",test[0]);
-		printf("\t\"encoded\":\"%s\",\n",encoded);
-	}
+        ret = zmat_encode(compressedlen, compressed, &encodedlen, &encoded, zmBase64, &status);
+
+        if (ret == 0) {
+            printf("{\n\t\"original\":\"%s\",\n", test[0]);
+            printf("\t\"encoded\":\"%s\",\n", encoded);
+        }
     }
 
     /* error handling */
-    if(ret){
-        printf("encoding failed, error code: %d: encoder error code %d\n",ret,status);
-	return ret;
+    if (ret) {
+        printf("encoding failed, error code: %d: encoder error code %d\n", ret, status);
+        return ret;
     }
 
     /*==========================================================*/
     /* decode and then decompress to restore the orginal string */
     /*==========================================================*/
-    
+
     /*first, perform base64 decoding*/
-    ret=zmat_decode(encodedlen,encoded, &decodelen, &decoded, zmBase64, &status);
-    if(ret==0){
+    ret = zmat_decode(encodedlen, encoded, &decodelen, &decoded, zmBase64, &status);
+
+    if (ret == 0) {
         /*next, decompress using zlib (deflate) */
-        ret=zmat_decode(decodelen,decoded, &decompressedlen, &decompressed, zmZlib, &status);
-	if(ret==0)
-		printf("\t\"decompressed\":\"%s\",\n",decompressed);
+        ret = zmat_decode(decodelen, decoded, &decompressedlen, &decompressed, zmZlib, &status);
+
+        if (ret == 0) {
+            printf("\t\"decompressed\":\"%s\",\n", decompressed);
+        }
     }
+
     printf("}\n");
+
     /* error handling */
-    if(ret){
-        printf("decoding failed, error code: %d: decoder error code %d\n",ret,status);
-	return ret;
+    if (ret) {
+        printf("decoding failed, error code: %d: decoder error code %d\n", ret, status);
+        return ret;
     }
 
     /*==================================*/
     /* host must free buffers after use */
     /*==================================*/
 
-    if(compressed)
+    if (compressed) {
         free(compressed);
-    if(encoded)
+    }
+
+    if (encoded) {
         free(encoded);
-    if(decoded)
+    }
+
+    if (decoded) {
         free(decoded);
-    if(decompressed)
+    }
+
+    if (decompressed) {
         free(decompressed);
+    }
+
     return 0;
 }
diff --git a/src/Makefile b/src/Makefile
index ef5e279..5921bd0 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -180,7 +180,7 @@ pretty:
 	    --suffix=none \
 	    --formatted \
 	    --break-blocks \
-	   "*.c" "../include/*.h" "*.cpp"
+	   "*.c" "../include/*.h" "*.cpp" "../example/c/*.c"
 
 .PHONY: all mex oct lib dll