Use Assert to Catch Logic Programming Errors
The assert macro is a very nice utility for programmers. It may sound complicated, but it is just a small macro that exits the program, giving us some debugging information on where the assertion happened, if a certain condition gets evaluated to false. Therefore :
assert (1 == 0) // returns false, the program exits assert (1 == 1) // returns true, the program keeps running normally
Whenever you know of a certain milestone that has to be met, you can use assert. For instance, if you do not want a certain sum to exceed a value, you just use an assert to catch that programming error, if it ever happens. Now follows a small program to show the assert usage :
#include <assert.h>
void main()
{
int x = 0;
int y = 1;
assert (x == y);
}
x does not equal to y and therefore, once this gets executed, we get the following error :
Assertion failed: (x == y), function main, file assert.c, line 8.
Abort trap
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