Counting top students, C++ (gcc)

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/*
** Counting top students**
This challenge is to count how many students scored 90 or more on a test.
Your program should read in a sequence of whole numbers, stopping when -1 is entered, 
and display how many of the numbers were 90 or more. 
If a number less than -1 or more than 100 is entered, an error message should be displayed.
*/
//g++  5.4.0

#include <iostream>
#include <string>

using namespace std;

int main()
{
   // std::cout << "Hello, world!\n";

//declare index and counter.
    int i=0;
    int numOfElements=0;
   
    //delare array and assign input values
    int input[7]={30,122,94,98,-1,50,100};
    
    for (i=0;i<7;i++){
         int inputs=input[i];
       // std::cout<<inputs<<'\n';
        
        if (inputs==-1){
        std::cout<<inputs<<" stop activated"<<'\n'; break;
        }
        
         if (inputs<-1||inputs>100){
        std::cout<<inputs<<" is not a valid number"<<'\n';
         }
        
        if (inputs>=90&&inputs<=100){
            numOfElements++;
            
        }
    }std::cout<<"number of scores greater than 90 is: "<<numOfElements<<'\n';

return 0;
}

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Compilation time: 0.43 sec, absolute running time: 0.17 sec, cpu time: 0.11 sec, memory peak: 3 Mb, absolute service time: 0,61 sec