C++ Program to generate frequency table

// program for generation of frequency table
void main ()
{
int i, j, k, stud [30], Range [10], N;
cout << "Enter how many students u want:";
cin >> N;
range [j] = 0;
for (j=0;j<10;j++)
for (i=0;i<N;i++)
{
cout << "Enter student No : "<< i + 1"; \t";
cin >> stud [i];
if (stud [i] >= 0 && stud [i] <= 10)
range [0] = range [0] + 1;
else
if (stud [i] >= 11 && stud [i] <= 20)
range [1] = range [1] + 1;
else
if (stud [i]>= 21&& stud [i] <= 30)
range [2] = range [2] + 1;
else
————
————
if (stud [i] >= 91 && stud [i] < = 100)
range [a] = range [a] + 1;
}
cout << "\n\ t Class-Intervals \t Observations \n"
<< "…………………………………………………";
for (i=0; j=10; k=0; i<91 && < 100 && k<=10; i+=10;j+=10, k++)
cout << "\n\t"<< 1 << "…………………" << j << "\t < < range
cout << "\n\n\t Total observation " << k;
}