作业5：输出以下 4*5 的矩阵。 1 2 3 4 5 2 4 6 8 10 3 6 9 12 15 4 8 12 16 20

#include
using namespace std;
int main() {
int a = 0, b = 0, c = 0, d = 0;
for (int i = 0; i < 5; i++) {
a++;
cout << a << “\t”;
}cout << “\n”;
for (int i = 0; i < 5; i++) {
b = b + 2;
cout << b << “\t”;
}cout << “\n”;
for (int i = 0; i < 5; i++) {
c = c + 3;
cout << c << “\t”;
}cout << “\n”;
for (int i = 0; i < 5; i++) {
d = d + 4;
cout << d << “\t”;
}
}