Write a program that lets you know if you can have a key or not, based on your role at the school.
First ask for the user’s role at the school. They can be a student, administrator, or a teacher. (And remember that capitalization is important! ‘Student’ is not the same as ‘student’.)
Example 1: Administrator or Teacher
For example, if this was the input:
Are you an administrator, teacher, or student?: teacher
This should be the output:
Administrators and teachers get keys!
Example 2: Student
And if this was the input:
Are you an administrator, teacher, or student?: student
This should be the output:
Students do not get keys!
(Note: You should also be able to handle a situation where the user enters a value other than administrator, teacher or student and tell them they must be one of the three choices!)
Example 3: Other
If they input anything else:
Are you an administrator, teacher, or student?: secretary
This should be the output:
You can only be an administrator, teacher, or student!
Выведем номер первого столбца матрицы a[n][m], не содержащего отрицательных элементов, или -1, если такого столбца не существует.
Код#include <bits/stdc++.h>
using namespace std;
int main() {
int n, m;
cin >> n >> m;
int a[n][m];
for (int i = 0; i < n; ++i)
for (int j = 0; j < m; ++j)
cin >> a[i][j];
for (int j = 0; j < m; ++j) {
bool b = 1;
for (int i = 0; i < n && b; ++i)
b = (a[i][j] >= 0);
if (b) {
cout << (j+1) << endl;
return 0;
}
}
cout << -1 << endl;
return 0;
}