Portabilty - 2004 Rocky Mountain Regional ACM

Using the provided examples will save you time and portability problems

• Count in C: count.c
• Count in C++: count.cpp
• Count in Java: count.java

Declare main like this:

int main(int argc, char *argv[])

You don't have to use the argc and argv arguments. But you should return an integer instead of nothing:

return 0;

C++: explicitly state "using namespace std":

  #include <string>
  #include <iotream>
  using namespace std;

Microsoft has non-portable rules about the scope of variables declared at the beginning of a for loop:

for (int i=0; i<10; ++i) {
  ...
} 
<-- i still lives here on a microsoft compiler (which is nonstandard)

To get a consistent scope for i,

{for (int i=0; i<10; ++i) {
  ...
}} 
<-- i is out of scope on microsoft or gcc compiler

64 bit integers have two different declarations between microsoft and gcc

You can portably do this:

#ifdef _MSC_VER
  typedef __int64 int64_t;
#else
  typedef long long int64_t;
#endif

After this "int64_t" will mean a 64-bit int on either the microsoft or gcc compiler.