Print Screen of first few lines tells me nothing.
From my point of view, the WeatherMeters.cpp file is missing in your project and the main.cpp file must contain content like below (only example, nothing real)
#include "mbed.h"
#include "WeatherMeters.h"
WeatherMeters station(A0, A1, A2, Weather_auto); // I do not know your pins so I use fake pins
// rest of globals
int main() {
printf("Mbed WeatherMeters example\r\n");
// do something before loop
while(1){
// do something in loop
}
}
I suppose you do not have int main() in your main.cpp and that is the reason why your project can not be compiled.