diff --git a/README b/README
index 914a11b..fbc3744 100644
--- a/README
+++ b/README
@@ -1 +1,7 @@
-clang main.c -o golfing && ./golfing
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+# code
+
+```c
+int main(){for(;;){char i[99];int r=0;scanf("%s",i);char*t=strtok(i,"+");while(t){char*p=t;while(*p){if(!isdigit(*p)) return 1;p++;} r+=atoi(t);t=strtok(0,"+");} printf("%d\n",r);}}
+```
+
+`cc main.c -std=c99 -o golfing --include stdio.h --include string.h --include ctype.h --include stdlib.h && ./golfing`
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diff --git a/main.c b/main.c
index a7a5bc4..211ec12 100644
--- a/main.c
+++ b/main.c
@@ -1,16 +1,10 @@
-#include <ctype.h>
-#include <stdio.h>
-
-long atoi();
-char *strtok();
-
 int main() {
   for (;;) {
     char i[99];
     int r = 0;
     scanf("%s", i);
     char *t = strtok(i, "+");
-    while (t != NULL) {
+    while (t) {
       char *p = t;
       while (*p) {
         if (!isdigit(*p))
@@ -18,7 +12,7 @@ int main() {
         p++;
       }
       r += atoi(t);
-      t = strtok(NULL, "+");
+      t = strtok(0, "+");
     }
     printf("%d\n", r);
   }
diff --git a/min.c b/min.c
index 9d77aef..dea32fb 100644
--- a/min.c
+++ b/min.c
@@ -1,3 +1 @@
-#include <ctype.h>
-#include <stdio.h>
-long atoi();char*strtok();int main(){for(;;){char i[99];int r=0;scanf("%s",i);char*t=strtok(i,"+");while(t!=NULL){char*p=t;while(*p){if(!isdigit(*p)) return 1;p++;} r+=atoi(t);t=strtok(NULL,"+");} printf("%d\n",r);}}
\ No newline at end of file
+int main(){for(;;){char i[99];int r=0;scanf("%s",i);char*t=strtok(i,"+");while(t){char*p=t;while(*p){if(!isdigit(*p)) return 1;p++;} r+=atoi(t);t=strtok(0,"+");} printf("%d\n",r);}}
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