int store_int_variable_value_to_array(const char *variable, int value,
struct plotter_config *cfg);
int replace_variables_with_values(char *str, size_t len,
int store_int_variable_value_to_array(const char *variable, int value,
struct plotter_config *cfg);
int replace_variables_with_values(char *str, size_t len,