ch2-assert

Chapter_2     tempfile

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assert.c     ALP, p. 38

#include <stdio.h> // for NULL
// stdio,h includes stddef.h, which defines NULL:
// /usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:
// #define NULL ((void *)0)
#include <assert.h> // for assert()

int do_something(void) {return 0;}

int main()
{
int i, status;

for (i = 0; i < 100; i++)
{
status = do_something();
assert(status == 0);
}

char *p = NULL;

assert(p != NULL);

return 0;
}
/*
gcc assert.c -o assert
./assert
assert: assert.c:21: main: Assertion `p != NULL' failed.
Aborted (core dumped)

gcc -DNDEBUG assert.c -o assert
./assert
*/

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Chapter_2     tempfile

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