read a file .txt with numbers and words as a array to calcule max, min, average

[bbaixinho]

i want read this file and write as array to calculate average of age, classification:
"name age classificacion at school
john 21 10
maria 25 20
ricky 30 8"

  double x[4][3];
    ifstream ficheiro("info.txt");
    int c=0;
    int l=0;
    while(!ficheiro.eof()){
         ficheiro>>x[c][l];   //l=rows, c=columns
         c++;
             if(l==0){
             c=0;
             l++; }
             if(c==2 && l>0){
             c=0;
             l++;
             } 
         }
         
    cout<<x[1][1]+x[1][2];

but i can't make the sum because i think de program dont func because the characters in the first line, but if a put string dont calculate because the progm dont read the numbers as "numbers". What i make? i can't change the txt file

[MiiNiPaa]

struct student
{
    std::string name;
    int age;
    int classification;
};

//...

std::ifstream input(/*...*/);
const int NUM = 4;
student data[NUM];
int pos = 0;
//      ↓overflow check   ↓Check stream state, do not check for EOF. It does not work as you think.
while(pos < NUM && input >> data[pos].name >> data[pos].age >> data[pos].classification)
    ; //You do not do anything else in your code so body is empty 

You actually do not need an array to calculate averages, you can count everything on fly:

int sum_age = 0;
int sum_class = 0;
int count = 0;
std::string dummy;
int age, class;
while(input >> dummy >> age >> class) {
    sum_age += age;
    sum_class += class;
    ++count;
}
std::cout << "Average age = " << static_cast<double>(sum_age)/count << '\n' <<
             "Average classification = " <<  static_cast<double>(sum_class)/count << std::endl;

[bbaixinho]

This is for a school work and yet i didn't learn struct, there is another way?
I also don't understand the command "static_cast<double>", can explain me or help me to find another solution?
This is possible with getline?
Thanks a lot

[bbaixinho]

i made this:
[/code]
double name[60];
double age[60];
double class[60];
ifstream infile;
infile.open("stat.txt");//open the text file
if (!infile)
{
cout << "Unable to open file";
exit(1); // terminate with error
}
i=0;
while (!infile.eof())
{

infile >>name[i] >> age[i] >> class[i];
i++;
}
for (x=0;x<2;x++)
cout<<name[x]<<"\t"<< age[x] << "\t" << class[x]<<"\t"<<endl;
infile.close();
[/code]
This only func if i remove the first line of the file( "name age ...") but i cant remove the first row. How can i do?