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79 | #include <mpi.h>
#include <iostream>
#include <stdexcept>
#include "UniformRandom.hpp"
#define fail(msg) throw std::runtime_error(msg)
void generate_lucky_statistics(int process_number, int process_count);
int main(int argc, char* argv[]) {
int error = EXIT_SUCCESS;
if (MPI_Init(&argc, &argv) == MPI_SUCCESS) {
try {
int process_number = -1;
MPI_Comm_rank(MPI_COMM_WORLD, &process_number);
int process_count = -1;
MPI_Comm_size(MPI_COMM_WORLD, &process_count);
char process_hostname[MPI_MAX_PROCESSOR_NAME] = { '\0' };
int hostname_length = -1;
MPI_Get_processor_name(process_hostname, &hostname_length);
generate_lucky_statistics(process_number, process_count);
} catch (const std::runtime_error& exception) {
std::cout << exception.what() << std::endl;
error = EXIT_FAILURE;
}
MPI_Finalize();
} else {
std::cerr << "error: could not init MPI" << std::endl;
error = EXIT_FAILURE;
}
return error;
}
void generate_lucky_statistics(int process_number, int process_count) {
// TODO(you): Generate my lucky number
const int my_lucky_number = -1;
int all_min = -1;
int all_max = -1;
int all_sum = -1;
// TODO(you): Update distributed statistics from processes' lucky numbers
const double all_average = double(all_sum) / process_count;
std::cout << "Process " << process_number << ": all minimum = "
<< all_min << std::endl;
std::cout << "Process " << process_number << ": all average = "
<< all_average << std::endl;
std::cout << "Process " << process_number << ": all maximum = "
<< all_max << std::endl;
if (my_lucky_number == all_min) {
std::cout << "Process " << process_number << ": my lucky number ("
<< my_lucky_number << ") is the minimum (" << all_min << ")" << std::endl;
}
if (my_lucky_number < all_average) {
std::cout << "Process " << process_number << ": my lucky number ("
<< my_lucky_number << ") is less than the average (" << all_average
<< ")" << std::endl;
} else if (my_lucky_number > all_average) {
std::cout << "Process " << process_number << ": my lucky number ("
<< my_lucky_number << ") is greater than the average (" << all_average
<< ")" << std::endl;
} else {
std::cout << "Process " << process_number << ": my lucky number ("
<< my_lucky_number << ") is equal to the average (" << all_average
<< ")" << std::endl;
}
if (my_lucky_number == all_max) {
std::cout << "Process " << process_number << ": my lucky number ("
<< my_lucky_number << ") is the maximum (" << all_max << ")" << std::endl;
}
}
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