Šiame pavyzdyje išmoksite dauginti dvi matricas ir jas rodyti naudodamiesi vartotojo apibrėžta funkcija.
Norėdami suprasti šį pavyzdį, turėtumėte žinoti šias C ++ programavimo temas:
- C ++ masyvai
- C ++ daugiamatės masyvai
- Masyvo perdavimas C ++ programavimo funkcijai
Ši programa prašo vartotojo įvesti matricos dydį (eilutes ir stulpelius).
Tada jis paprašo vartotojo įvesti dviejų matricų elementus ir galiausiai padaugina dvi matricas ir parodo rezultatą.
Norėdami atlikti šią užduotį, atliekamos trys funkcijos:
- Paimti iš vartotojo matricos elementus
- Padauginti dvi matricas
- Norėdami parodyti gautą matricą po padauginimo
Pavyzdys: Padauginkite matricą, perduodami ją funkcijai
#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
