add pressure ratio output

1 files changed, 2 insertions, 0 deletions

diff --git a/engine.h b/engine.h
index 89c6a13..7e1eb1e 100644
--- a/engine.h
+++ b/engine.h
@@ -11,4 +11,6 @@ typedef struct {
 } Engine;
 
 void init_engine(Engine *e);
+Pressure comp_outlet_pressure(const Engine *e);
+double pressure_ratio(const Engine *e);
 VolumeFlowRate volume_flow_rate(const Engine *e);