diff --git a/Makefile b/Makefile
index d4653d2..373c1e8 100644
--- a/Makefile
+++ b/Makefile
@@ -36,11 +36,13 @@ D_LIB         = ./libft
 D_HEADERS     = ./headers
 HEADERS       = computorv1.h \
 				errors.h \
-				lexer.h
+				lexer.h \
+				parser.h
 D_SRCS        = ./src
 SRCS          = computorv1.c \
 				errors.c \
-				lexer.c
+				lexer.c \
+				parser.c
 
 # COMPILATION CONFIG :
 CC            = gcc
@@ -95,7 +97,7 @@ $(NAME): $(OBJS)
 
 run: $(NAME)
 	@echo $(YELLOW)"run"$(RESET)
-	@./$(NAME) "3 * x^2 + 1 * x^1 - 2 * x^0 = 5 * x^1"
+	@./$(NAME) "3.4 * x^2 + 1 * x^1 - 2 * x^0 = 5.123 * x^1"
 
 clean:
 	$(RM_OBJS)
diff --git a/headers/computorv1.h b/headers/computorv1.h
index 91f70cc..ab29d7a 100644
--- a/headers/computorv1.h
+++ b/headers/computorv1.h
@@ -1,4 +1,10 @@
 #ifndef COMPUTORV1_H
 #define COMPUTORV1_H
 
+#include "libft.h"
+#include "lexer.h"
+#include "parser.h"
+#include "errors.h"
+#include <stdio.h> // tmp for printf, for float debug
+
 #endif
\ No newline at end of file
diff --git a/headers/lexer.h b/headers/lexer.h
index 8402982..ae53511 100644
--- a/headers/lexer.h
+++ b/headers/lexer.h
@@ -1,6 +1,10 @@
 #ifndef LEXER_H
 #define LEXER_H
 
+#include "libft.h"
+#include "errors.h"
+#include <stdbool.h>
+
 typedef enum
 {
     TOKEN_VARIABLE,      // x, y, etc.
@@ -24,6 +28,6 @@ typedef struct
     };
 } token;
 
-void lexerize(const char *input, token *tokens);
+int lexerize(const char *input, token *tokens);
 
 #endif
\ No newline at end of file
diff --git a/headers/parser.h b/headers/parser.h
new file mode 100644
index 0000000..bc0c36c
--- /dev/null
+++ b/headers/parser.h
@@ -0,0 +1,27 @@
+#ifndef PARSER_H
+#define PARSER_H
+
+#include "libft.h"
+#include "lexer.h"
+#include "errors.h"
+
+typedef enum
+{
+    TERM_LEFT,  // a in "a = b"
+    TERM_RIGHT, // b in "a = b"
+} term_type;
+
+typedef struct
+{
+    term_type type;
+    union
+    {
+        char value_char;
+        int value_int;
+        double value_double;
+    };
+} term;
+
+int parse(token *tokens, term *terms);
+
+#endif
\ No newline at end of file
diff --git a/src/computorv1.c b/src/computorv1.c
index b425602..fd59c9e 100644
--- a/src/computorv1.c
+++ b/src/computorv1.c
@@ -1,8 +1,4 @@
 #include "computorv1.h"
-#include "libft.h"
-#include "lexer.h"
-#include "errors.h"
-#include <stdio.h> // tmp for float debug
 
 void remove_spaces(char *s)
 {
@@ -63,7 +59,11 @@ int main(int ac, char **av)
     ft_putchar('\n');                       // debug
 
     token tokens[arg_len];
-    lexerize(input, tokens);
+    int token_count = lexerize(input, tokens);
+
+    ft_putstr("-> token_count : "); // debug
+    ft_putnbr(token_count);         // debug
+    ft_putchar('\n');               // debug
 
     // tmp debug output
     ft_putchar('\n'); // debug
@@ -105,6 +105,15 @@ int main(int ac, char **av)
         }
         i++;
     }
+    ft_putchar('\n'); // debug
+    // END tmp debug output
+
+    term terms[token_count / 2];
+    int term_count = parse(tokens, terms);
+
+    ft_putstr("-> term_count : "); // debug
+    ft_putnbr(term_count);         // debug
+    ft_putchar('\n');              // debug
 
     return (0);
 }
diff --git a/src/lexer.c b/src/lexer.c
index 788f57c..f89d3cd 100644
--- a/src/lexer.c
+++ b/src/lexer.c
@@ -1,7 +1,4 @@
 #include "lexer.h"
-#include "libft.h"
-#include "errors.h"
-#include <stdbool.h>
 
 // any single letter is a valid variable, like 'x' or 'y'
 static bool token_is_variable(const char *input, int input_pos, int *token_size)
@@ -153,7 +150,7 @@ static bool token_is_equal(const char *input, int input_pos, int *token_size)
 /**
  * LEXER
  */
-void lexerize(const char *input, token *tokens)
+int lexerize(const char *input, token *tokens)
 {
     int token_count;
     int input_pos;
@@ -222,4 +219,6 @@ void lexerize(const char *input, token *tokens)
 
     tokens[token_count].type = TOKEN_END;
     tokens[token_count].value_char = '\0';
+
+    return token_count;
 }
diff --git a/src/parser.c b/src/parser.c
new file mode 100644
index 0000000..62eebbb
--- /dev/null
+++ b/src/parser.c
@@ -0,0 +1,10 @@
+#include "parser.h"
+
+int parse(token *tokens, term *terms)
+{
+    if (tokens)
+    {
+        terms[0].type = 0;
+    }
+    return 1;
+}
\ No newline at end of file