diff --git a/src/main.c b/src/main.c
index d8694c4..759ed0d 100644
--- a/src/main.c
+++ b/src/main.c
@@ -7,7 +7,7 @@
 #include <assert.h>
 
 #ifndef NDEBUG
-    #define DEBUG 
+    #define DEBUG
 #endif
 
 
@@ -24,9 +24,9 @@ int main(int argc, char *argv[])
     printf("\n+++++++++++++++++++++++++++++++++++++++++++++++\n+Boot: "CPU_TYPE
     " with %zu x %zu Bit RAM.+\n+++++++++++++++++++++++++++++++++++++++++++++++\n\n"
     ,(sizeof(ram)/sizeof(ram[0])),sizeof(ram[0])*8);
-    
+
     if(initialise_ram(ram,argc,argv)==-1) return 1; //load data from command line into RAM
-                                                    //(-1 in case of error, 
+                                                    //(-1 in case of error,
                                                     //else number of correct read worts)
 
     while(run)
@@ -43,9 +43,9 @@ int main(int argc, char *argv[])
         printf("\ninstruction result:\n");
 
         //CPU control flow
-        if(execute(op_code,data_addr,ram))  //EXECUTE instruction, jump if ALU says 
+        if(execute(op_code,data_addr,ram))  //EXECUTE instruction, jump if ALU says
             pc=get_data(ir);
-        else pc++; 
+        else pc++;
 
         if(pc>=RAM_SIZE) pc %= RAM_SIZE;	//TOY_CPU can only address 12 Bit
 
diff --git a/src/toy.c b/src/toy.c
index 2a92b04..dc9e54f 100644
--- a/src/toy.c
+++ b/src/toy.c
@@ -47,13 +47,13 @@ int initialise_ram(uint16_t *ram, int argc, char **argv )
     //open and check the input stream
     FILE *fp;
     int j=0,int_cache=0;
-    char tempS[CPU_WORD_SIZE+1]; //+1 for "\0"	
+    char tempS[CPU_WORD_SIZE+1]; //+1 for "\0
 
     for(int i=0;i<RAM_SIZE;i++) ram[i]=0;	//initialize the toy-RAM with NULL
 
-    if(argc<2) 
+    if(argc<2)
     {
-        fprintf(stderr,"%s","no \".toy\" input file!\n" 
+        fprintf(stderr,"%s","no \".toy\" input file!\n"
                 "interpretation terminated. (press -h for help)\n");
         return -1;
     }
@@ -76,13 +76,13 @@ int initialise_ram(uint16_t *ram, int argc, char **argv )
     }
 
 	// Fill the toy-RAM with data and break in case of error
-	for(;;) 						
+	for(;;)
 	{
 		for(int i = 0;i <= CPU_WORD_SIZE;i++)
 		{
 			int_cache = fgetc(fp);
 
-			if((int_cache =='\n' && i<CPU_WORD_SIZE) || (feof(fp) && i!=0)) 
+			if((int_cache =='\n' && i<CPU_WORD_SIZE) || (feof(fp) && i!=0))
 			{
 				fprintf(stderr,"%s","input file has incorrect machine-word size !\n");
 				fclose(fp);
@@ -129,7 +129,7 @@ int get2compl(uint16_t value)
     {
         value=(~value)+1;
         sign_value = value*(-1);
-    }    
+    }
     return sign_value;
 }
 
diff --git a/src/toy.h b/src/toy.h
index a263512..4662ee6 100644
--- a/src/toy.h
+++ b/src/toy.h
@@ -2,27 +2,27 @@
 #define TOY_H
 
 #define CPU_TYPE "Koopman_TOY_CPU"
-#define RAM_SIZE 4096 
+#define RAM_SIZE 4096
 #define CPU_WORD_SIZE 16
 
 
 /**
 * print_instructionSet(): print the cpu instruction set
-* This is a user help function, can be activated via 
+* This is a user help function, can be activated via
 * the -h paramter.
-* Return: none 
+* Return: none
 */
 
 void print_instructionSet(void);
 
 /**
 * initialise_ram(): read inputstream into the toy-ram
-* Return: 
-*	the number of successfully read machine words, 
+* Return:
+*	the number of successfully read machine words,
 *	-1 in case of error
-*/ 
+*/
 
-int initialise_ram(uint16_t *ram, int argc, char **argv ); 
+int initialise_ram(uint16_t *ram, int argc, char **argv );
 
 /**
 * get_opcode(): segments the mashine code in the OP-Code