function and array
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#include <iostream>
#include <cstdlib>
#include <ctime>
#include <cmath>
using namespace std;
void printTemperature() {
cout << "It is 70 degrees F!" << endl;
}
void add2Nums(int a, int b) {
int sum = a+b;
cout << sum << endl;
}
double hypot(double base, double height) {
return sqrt(base*base + height*height);
;
}
int main() {
int student[5] = { 1, 2, 3, 4, 5};
cout << student[0] << endl;
cout << student[1] << endl;
cout << student[2] << endl;
cout << student[3] << endl;
string abc[5] = { "a","bbb","cc","ss","sss"};
cout << abc[1]<< endl;
int n = 15;
double random[n];
for (int i = 0;i < n; i++)
{
random[i] = ((double)rand())/RAND_MAX;
cout << random[i] << endl;
}
double sum = 0.0;
for (int i = 0; i<n;i++)
{
sum += random[i];
}
cout << "sum is:"<< sum << endl;
cout << "mean is :" << sum/n << endl;
int m[3][2];
m[0][0] = 1;
m[1][0] = 2; m[2][0] = 3;m[0][1] = 1; m[1][1] =2 ; m[2][1] = 3;
cout<< m[0][0]<< endl;
int q[2][3] = {{1,2,3},{3,4,5}};
for (int i=0;i<5;i++){
printTemperature();
add2Nums(i,5);
}
double hypoten = hypot(5,4);
cout.precision(10);
cout << fixed<<hypoten << endl;
double h = (hypot(1,2),hypot(5,6));
cout.precision(5);
cout << h << endl;
}
Cpp
INFO