Question

How to print right triangle pattern of multiplication tables in C++

Answer 1

#include <iostream>
#include <iomanip>

void right_triangle_pattern_multiplication_tables(int rows) {
    std::cout << "* ";
    rows++;
    for (int i = 1; i < rows; i++) {
         std::cout << std::setw(3) << i;
    }
    printf("\n");
    
    for (int i = 1; i < rows; i++) {
        std::cout << i << ")";
        for (int j = 1; j <= i; j++) {
             std::cout << std::setw(3) << i * j;
        }
        std::cout << "\n";
    }
}
int main(void)
{
    right_triangle_pattern_multiplication_tables(9);
}
 


 
/*
run:
 
*   1  2  3  4  5  6  7  8  9
1)  1
2)  2  4
3)  3  6  9
4)  4  8 12 16
5)  5 10 15 20 25
6)  6 12 18 24 30 36
7)  7 14 21 28 35 42 49
8)  8 16 24 32 40 48 56 64
9)  9 18 27 36 45 54 63 72 81

*/

 

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