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An analysis tool showing the structure of a C program
CTREE is a command line utility providing analysis tools useful to software engineers tasked with tracking down problems or verifying a program's soundness. It is also an aid to understanding the structure of unfamiliar programs. As it works with standard C it finds most of its utility in embedded systems and older software.
CTREE comes with a comprehensive manual.
CTREE is is released by Cleveland Engineering Design, LLC - developer of the CoRTOS cooperative RTOS
https://sourceforge.net/projects/cortos-simple/ and PRTOS pre-emptive RTOS
https://sourceforge.net/projects/prtos-preemptive-rtos/
V 1.01 - fixed bug that could cause lock-ups or garbage output with some coding styles.