Halp PLEASE !

[actyon20]

Hy guys. I am new here and I need your help.Long story short I want to improve my efficiency at work and for that I want to write a small program in C++ , because I learned C++ long time ago in high school..
What do I need from the program :
1.I need to enter several variables from the keyboard , for example today will arrive 4 transports , next week 7 transports and for every transport I need to enter to cost individual . I thought to use array and here is my following try:

  int n; // n will be the number of transports that will change every time 
    int i;
    cin>>n;
    double receptii[n];
    for(i=0;i<n;i++) 
   {
       cin>>receptii[i];
   }
   
   return 0;
}

2.Of course the transports will suffer some operations (*-+/) and I need them to take individual , sum them and cout<< them .
I hope that express myself correctly.
Thank you in advance.

[TarikNeaj]

Hey and welcome. Please edit your post and use code tags for all of your code, to make it more readable - http://www.cplusplus.com/articles/jEywvCM9/

int n;
int i;
cin>>n;
double receptii[n]; // a big nono 

This is forbidden/illegal in c++. Arrays has to be constant at compile time. I would suggest you use an std::vector, but if you insist on using an array, you'd have to dynamically allocate memory.

int n;
int i;
cin>>n;
double* receptii = new double[n];

Of course then you'd also need to delete the allocated memory, otherwise you will have memory leak, and you don't want any of those - http://www.cplusplus.com/doc/tutorial/dynamic/

[RUNNER PRO AGARIO]

I agree with @TarikNeaj on using Vectors instead of arrays. In many cases, dynamically allocated arrays can create messes and sometimes memory leaks.