Diff to create usable test

$ diff -u original_onlyjob.c usable_onlyjob.c
--- original_onlyjob.c	2016-04-03 11:30:29.113618080 -0400
+++ usable_onlyjob.c	2016-04-03 13:41:24.235069236 -0400
@@ -7,24 +7,24 @@

 setbuf(stdout,NULL); //disable output buffering

-char *str=malloc(8);
+char *str=malloc(9);
 strcpy(str,"abcdefgh");

-str=realloc(str,strlen(str)+8);
+str=realloc(str,strlen(str)+1+8);
 strcat(str,"efghefgh");     //sprintf(str,"%s%s",str,"efghefgh");

-int imax=1024/strlen(str)*1024*4;
+unsigned int imax=1024/strlen(str)*1024*4;

 printf("%s","exec.tm.sec\tstr.length\n"); //fflush(stdout);

 time_t starttime=time(NULL);
 char *gstr=malloc(0);
-int i=0;
+unsigned int i=0;
 char *pos;
-int lngth;
+size_t lngth;

 char *pos_c=gstr;
-int str_len=strlen(str);
+size_t str_len=strlen(str);

     while(i++ < imax+1000){
         lngth=strlen(str)*i;
@@ -33,12 +33,12 @@
         pos_c+=str_len;

         pos=gstr;
-        while(pos=strstr(pos,"efgh")){
+        while((pos=strstr(pos,"efgh"))){
             memcpy(pos,"____",4);
         }

         if(lngth % (1024*256)==0){
-            printf("%dsec\t\t%dkb\n",time(NULL)-starttime,lngth/1024); //fflush(stdout);
+            printf("%lusec\t\t%lukb\n",time(NULL)-starttime,lngth/1024); //fflush(stdout);
         }
     }
 //printf("%s\n",gstr);