bison -d -t analyse_syntaxique.y -v
flex analyse_lexicale.lex 
gcc -w *.c -ly
echo "
    int main(){
        const int var1 = 1, var2;
        int var2 = 2 + 3;
        int var3, var4 = 4;
        while (!var2){
            var2 = 1;
            var3 = 4;
        }
        printf(var2);
        return 5;
    }
" | ./a.out