Selles näites saate õppida korrutama kahte maatriksit ja kuvama seda kasutaja määratud funktsiooni abil.
Selle näite mõistmiseks peaksid teil olema teadmised järgmistest C ++ programmeerimise teemadest:
- C ++ massiivid
- C ++ mitmemõõtmelised massiivid
- Massiivi edastamine funktsioonile C ++ programmeerimises
See programm palub kasutajal sisestada maatriksi suurus (read ja veerud).
Seejärel palub see kasutajal sisestada kahe maatriksi elemendid ja lõpuks korrutab kaks maatriksit ja kuvab tulemuse.
Selle ülesande täitmiseks tehakse kolm funktsiooni:
- Maatriksielementide võtmine kasutajalt
- Kahe maatriksi korrutamiseks
- Saadud maatriksi kuvamiseks pärast korrutamist
Näide: korrutage maatriks, edastades selle funktsioonile
#include using namespace std; void enterData(int firstMatrix()(10), int secondMatrix()(10), int rowFirst, int columnFirst, int rowSecond, int columnSecond); void multiplyMatrices(int firstMatrix()(10), int secondMatrix()(10), int multResult()(10), int rowFirst, int columnFirst, int rowSecond, int columnSecond); void display(int mult()(10), int rowFirst, int columnSecond); int main() ( int firstMatrix(10)(10), secondMatrix(10)(10), mult(10)(10), rowFirst, columnFirst, rowSecond, columnSecond, i, j, k; cout <> rowFirst>> columnFirst; cout <> rowSecond>> columnSecond; // If colum of first matrix in not equal to row of second matrix, asking user to enter the size of matrix again. while (columnFirst != rowSecond) ( cout << "Error! column of first matrix not equal to row of second." << endl; cout <> rowFirst>> columnFirst; cout <> rowSecond>> columnSecond; ) // Function to take matrices data enterData(firstMatrix, secondMatrix, rowFirst, columnFirst, rowSecond, columnSecond); // Function to multiply two matrices. multiplyMatrices(firstMatrix, secondMatrix, mult, rowFirst, columnFirst, rowSecond, columnSecond); // Function to display resultant matrix after multiplication. display(mult, rowFirst, columnSecond); return 0; ) void enterData(int firstMatrix()(10), int secondMatrix()(10), int rowFirst, int columnFirst, int rowSecond, int columnSecond) ( int i, j; cout << endl << "Enter elements of matrix 1:" << endl; for(i = 0; i < rowFirst; ++i) ( for(j = 0; j < columnFirst; ++j) ( cout << "Enter elements a"<< i + 1 << j + 1 <> firstMatrix(i)(j); ) ) cout << endl << "Enter elements of matrix 2:" << endl; for(i = 0; i < rowSecond; ++i) ( for(j = 0; j < columnSecond; ++j) ( cout << "Enter elements b" << i + 1 << j + 1 <> secondMatrix(i)(j); ) ) ) void multiplyMatrices(int firstMatrix()(10), int secondMatrix()(10), int mult()(10), int rowFirst, int columnFirst, int rowSecond, int columnSecond) ( int i, j, k; // Initializing elements of matrix mult to 0. for(i = 0; i < rowFirst; ++i) ( for(j = 0; j < columnSecond; ++j) ( mult(i)(j) = 0; ) ) // Multiplying matrix firstMatrix and secondMatrix and storing in array mult. for(i = 0; i < rowFirst; ++i) ( for(j = 0; j < columnSecond; ++j) ( for(k=0; k
Output
Enter rows and column for first matrix: 3 2 Enter rows and column for second matrix: 3 2 Error! column of first matrix not equal to row of second. Enter rows and column for first matrix: 2 3 Enter rows and column for second matrix: 3 2 Enter elements of matrix 1: Enter elements a11: 3 Enter elements a12: -2 Enter elements a13: 5 Enter elements a21: 3 Enter elements a22: 0 Enter elements a23: 4 Enter elements of matrix 2: Enter elements b11: 2 Enter elements b12: 3 Enter elements b21: -9 Enter elements b22: 0 Enter elements b31: 0 Enter elements b32: 4 Output Matrix: 24 29 6 25
