/* I'm writing this to understand how to use multiple dimensions arrays. Please notify me in the comments if I happen to misunderstood the concept. Inputs are very much welcome, including suggestions on how tos, and corrections. @Ipang ============================================ Thanks: @~ swim ~ for correction, guidance, and enlightenment ============================================ */ #include //using namespace std; int main() { // This is a 2 dimensions array with 3 rows // and 3 cols int arr[3][3] = {{1,2,3},{10,20,30},{20,40,60}}; // Manually select and display elements /* std::cout << arr[0][0] << std::endl; std::cout << arr[0][1] << std::endl; std::cout << arr[0][2] << std::endl; std::cout << arr[1][0] << std::endl; std::cout << arr[1][1] << std::endl; std::cout << arr[1][2] << std::endl; std::cout << arr[2][0] << std::endl; std::cout << arr[2][1] << std::endl; std::cout << arr[2][2] << std::endl; */ // For displaying array contents. std::string info[] = {"First ","Second ","Third "}; // Loop for rows for(int row = 0;row < 3; row++) { // Output "First row", "Second row" ... std::cout << info[row] << "Row\n"; // Loop for columns for(int col = 0; col < 3; col++) { std::cout << "arr[" << row << "][" << col << "] = "<< arr[row][col] << std::endl; } std::cout << std::endl; // extra line } /* Cross row calculation, no real calculation is done actually, just practicing the use of array indices. */ // Loop for columns for(int col = 1;col < 3;col++) { // Loop for rows for(int row = 0;row < 3;row++) { std::cout << arr[0][row] << " * " << arr[col][0] << " = " << arr[col][row] << std::endl; } std::cout << std::endl; // extra line } return 0; }

multi_dim_array