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adding recursive countdown function #63

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adding recursive countdown function #63

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30 changes: 30 additions & 0 deletions c++/countdwon.cpp
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Original file line number Diff line number Diff line change
@@ -0,0 +1,30 @@
#include <iostream>
#include <stdlib.h>

unsigned short countdown(unsigned short num)
{
if(!num)
{
std::cout << num << std::endl;
return countdown(num--);
}
else
{
std::cerr << "Boooom" << std::endl;
exit(-1);
}
}

int main(int argc, char const *argv[])
{
if(argc == 2)
{
countdown(static_cast<unsigned int>argv[1]);
return EXIT_SUCCESS;
}
else
{
std::cerr << "usage: countdown [NUM]" << std::endl;
return EXIT_FAILURE;
}
}