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Syntax#include <cstdlib> void abort( void );
The function abort() terminates the current program. Depending on the implementation, the return from the function can indicate a canceled (e.g. you used the signal() function to catch SIGABRT) or failed abort.
SIGABRT is sent by the process to itself when it calls the abort libc function, defined in cstdlib. The SIGABRT signal can be caught, but it cannot be blocked; if the signal handler returns then all open streams are closed and flushed and the program terminates (dumping core if appropriate). This means that the abort call never returns. Because of this characteristic, it is often used to signal fatal conditions in support libraries, situations where the current operation cannot be completed but the main program can perform cleanup before exiting. It is also used if an assertion fails.
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