написать команду для циклов с++

#include <stdlib.h>
#include <iostream>
#include <iomanip>
using namespace std;

int main() {
const int n = 5;
double a[n][n];
double m1, m2;

srand(time(0));
for (int i = 0; i < n; i++){
 for (int j = 0; j < n; j++){
a[i][j]=-20 + (101.0 / RAND_MAX) * rand();
cout << fixed << setw (7) << setprecision (2) << a[i][j];
 }
cout <<endl;
}
m1=a[0][0];
m2=a[0][n-1];
for (int i = 1; i < n; i++){
 if (a[i][i]>m1) m1=a[i][i];
 if (a[i][n-i-1]>m2) m2=a[i][n-i-1];
 }
 cout << "m1=" << m1 << "  m2=" << m2 << endl;
}
  37.11  71.19  25.77  53.53  35.74
  39.90  63.69  11.67  70.38  -4.10
  64.46  52.37  35.03  42.58  69.18
  44.22   8.46  13.23  71.17   3.10
   6.83  65.07  75.24  21.61  37.22
m1=71.17  m2=70.38

#include <iostream>
#include <cmath>
using namespace std;

void main() 
{
int n,sum=0; 
float y,k=0; 
cin >> n; 
int *mass = new int[n]; 
for (int i = 0;i < n;++i) 
{
cin >> mass[i]; 
} 
for (int i = 0;i < n;++i) 
{ 
if (mass[i] >0 )
{
k++;
y=pow(mass[i],2); 
cout<<y;
sum+=mas[i]
}
} 
system("pause"); 
}

2)#include <iostream>
#include <cmath>
using namespace std;

void main() 
{
int s,p,r,day=0;
cin >> s>>p>>r;
float km=s;
while(r>km)
{
km+=km*p/100;
day++;
}
cout << " km = " << km << " day = " << day << endl;
system ("pause");
}