Humans are also regularly harmed by pollution. Long-term exposure to air pollution, for example, can lead to chronic respiratory disease, lung cancer and other diseases. Toxic chemicals that accumulate in top predators can make some species unsafe to eat.
#include <iostream> is the Standard C++ way to include header files, the. 'iostream' is an identifier that maps to the file iostream.h. In older C++ you had to specify the filename of the header file, hence #include. <iostream.h>. Older compilers may not recognise the modern method, newer.
A vexing problem that has confounded many would-be outdoorsineers is this: how does one remember the difference between the terms âupstreamâ and âdownstreamâ? Unlike the difference between left and right, which has an easy mnemonic device, there is no easy way to remember which part of a river is upstream.