Объяснение:
1)
#include <iostream>
#include <string>
using namespace std;
int func(string s){
int sum = 1;
int i = 0;
while (i < s.length()){
if ((s[i] - '0')!=2 && (s[i] - '0')!=9)
{
sum*=(s[i]-'0');
}
i++;
}
return sum;
}
int main() {
string s = "";
cin>>s;
cout << func(s) <<endl;
return 0;
}
2)
#include <iostream>
using namespace std;
void change(int *arr){
int c = arr[3];
arr[3] = arr[4];
arr[4] = c;
for (int i=0;i<10;++i){
cout << i+1<<" = "<<arr[i]<<endl;
}
}
int main() {
int arr[10];
for (int i=0;i<10;++i){
cout << "Input element №:"<<i+1<<endl;
cin >> arr[i];
}
change(arr);
return 0;
}
true or not false and true => not true or false =
true or true and true => false or false =
true or true => false or false =
true => false or false =
true => false =
false