Added single character output

README.md

@@ -4,7 +4,8 @@ Stack based virtual machine and assembly code compiler
 
 ## Features
 
-- Binary code execution (assembly language compilation coming soon)
+- Assembly language compilation
+- Binary code execution
 - Assembly
   - Stack operations (push & pop)
   - Arithmetics operations
@@ -32,12 +33,13 @@ Stack based virtual machine and assembly code compiler
   Removes two top values in stack and pushes modulo
 - **IN**
   Inputs string with C I/O operators
-- **OUT**
+- **OUTS**
   Outputs string with C I/O operators
+- **OUTC**
+  Outputs one stack element as char with I/O operators
 
 ## TODO
 
-- Assembly compiler
 - Variables
 - Arithmetics operators
 - Strings

src/command.c

@@ -10,7 +10,8 @@ cmd_desc_t cmd_desc[] = {
     {MOD, 0, "MOD"},
 #ifdef IO_OPERATIONS
     {IN, 0, "IN"},
-    {OUT, 0, "OUT"},
+    {OUTS, 0, "OUTS"},
+    {OUTC, 0, "OUTC"},
 #endif
     {NONE, 0, "NONE"}};
 

src/command.h

@@ -16,7 +16,8 @@ enum command_e
   MOD,
 #ifdef IO_OPERATIONS
   IN,
-  OUT,
+  OUTS,
+  OUTC,
 #endif
   NONE
 };

src/run.c

@@ -145,7 +145,7 @@ int exec(command_t cmd, stack_t *stack)
   /**
    * Outputs string with C I/O operators
    */
-  case OUT:
+  case OUTS:
   {
     char ch = stack_pop(stack, res);
     if (res != NULL)
@@ -160,6 +160,18 @@ int exec(command_t cmd, stack_t *stack)
     }
   }
   break;
+  /**
+   * Outputs one stack element as char with I/O operators
+   */
+  case OUTC:
+  {
+    char ch = stack_get(stack, stack->cursor, res);
+    if (res != NULL)
+      return *res;
+
+    putchar(ch);
+  }
+  break;
 #endif
   default:
     return 1;