Ничего сложного
Объяснение:
1.
#include <iostream>
using namespace std;
int main() {
setlocale(LC_ALL, "rus");
int that = 1, index = 1, sum_index = 0, sum_element = 0;
while (that != 0) {
cin >> that;
if (that % 2 == 0) sum_element += that;
if (index % 2 == 0) sum_index += that;
index++;
}
cout << "Сумма четных элементов = " << sum_element << endl;
cout << "Сумма элементов с четными индексами = " << sum_index;
}
2.
#include <iostream>
using namespace std;
void cycle_for() {
int sum = 0;
for (int i = 50; i <= 150; i++) if (i % 4 == 0) sum += i * i;
cout << "Cycle for: " << sum << endl;
}
void cycle_while() {
int i = 50, sum = 0;
while (i <= 150) {
if (i % 4 == 0) sum += i * i;
i++;
}
cout << "Cycle while: " << sum << endl;
}
void cycle_do_while() {
int i = 50, sum = 0;
do {
if (i % 4 == 0) sum += i * i;
i++;
} while (i <= 151);
cout << "Cycle do while: " << sum;
}
int main() {
cycle_for();
cycle_while();
cycle_do_while();
}
#include <iostream>
int main(){
int n, m;
std :: cin >> n >> m;
int array[109][109];
for (int i = 0; i<n; ++i){
for (int j = 0; j<m; ++j)
{
if (i==0 || i%2==0) std :: cin >> array[i+1][j];
else std :: cin >> array[i-1][j];
}
}
for (int i=0; i<n; ++i){
for (int j= 0; j<m; ++j)
{
std :: cout << array[i][j]<< ' ';
}
std :: cout << std :: endl;
}
}