multi.cpp 4.57 KB
 Mario Bajer committed May 08, 2020 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 ``````#include "Matrix.hpp" int cut = 64; Matrix mult_std(Matrix a, Matrix b) { Matrix c(a.dim); for (int i = 0; i < a.dim; i++) for (int k = 0; k < a.dim; k++) for (int j = 0; j < a.dim; j++) c(i,j) += a(i,k) * b(k,j); return c; } Matrix get_part(int pi, int pj, Matrix m) { Matrix p(m.dim / 2); pi = pi * p.dim; pj = pj * p.dim; for (int i = 0; i < p.dim; i++) for (int j = 0; j < p.dim; j++) p(i,j) = m(i + pi,j + pj); return p; } void set_part(int pi, int pj, Matrix* m, Matrix p) { pi = pi * p.dim; pj = pj * p.dim; for (int i = 0; i < p.dim; i++) for (int j = 0; j < p.dim; j++) (*m)(i + pi,j + pj) = p(i,j); } Matrix mult_strassen(Matrix a, Matrix b) { if (a.dim <= cut) return mult_std(a, b); Matrix a11 = get_part(0, 0, a); Matrix a12 = get_part(0, 1, a); Matrix a21 = get_part(1, 0, a); Matrix a22 = get_part(1, 1, a); Matrix b11 = get_part(0, 0, b); Matrix b12 = get_part(0, 1, b); Matrix b21 = get_part(1, 0, b); Matrix b22 = get_part(1, 1, b); Matrix m1 = mult_strassen(a11 + a22, b11 + b22); Matrix m2 = mult_strassen(a21 + a22, b11); Matrix m3 = mult_strassen(a11, b12 - b22); Matrix m4 = mult_strassen(a22, b21 - b11); Matrix m5 = mult_strassen(a11 + a12, b22); Matrix m6 = mult_strassen(a21 - a11, b11 + b12); Matrix m7 = mult_strassen(a12 - a22, b21 + b22); Matrix c(a.dim); set_part(0, 0, &c, m1 + m4 - m5 + m7); set_part(0, 1, &c, m3 + m5); set_part(1, 0, &c, m2 + m4); set_part(1, 1, &c, m1 - m2 + m3 + m6); return c; } Matrix run(Matrix (*f)(Matrix, Matrix), Matrix a, Matrix b) { Matrix c(a.dim); if(a.dim != b.dim) { cout << "Dimensions of Matrices do not match!" << endl; return c; } c = f(a, b); return c; } int main(){ Cgicc formData; htmlHeader("multi.cgi"); cout << "\n"; // cout << "
" << endl; cout << "
" << endl; string matrixs1 = ""; string matrixs2 = ""; form_iterator fi1 = formData.getElement("multi1"); if( !fi1->isEmpty() && fi1 != (*formData).end()) { matrixs1 = **fi1; cout << matrixs1 << endl; } else { cout << "Error on Matrix 1!" << endl; } form_iterator fi2 = formData.getElement("multi2"); if( !fi2->isEmpty() && fi2 != (*formData).end()) { matrixs2 = **fi2; cout << matrixs2 << endl; } else { cout << "Error on Matrix 2!" << endl; } string debug = "debug 0"; cout << debug << endl; json json1; json json2; ifstream in1(matrixs1); ifstream in2(matrixs2); in1 >> json1; in2 >> json2; cout << "debug 1" << endl; // cout << "

" << json1 << "

" << endl; // cout << "Back to Index"; // cout << "

" << json1 << "

" << endl; Matrix matrix1(2); vector v1 = json1["matrix"]; matrix1.ID = json1["id"]; matrix1.dim = json1["dimension"]; matrix1.data = &v1[0]; cout << to_string(matrix1.ID) << endl; // matrix.print(); Matrix matrix2(2); vector v2 = json1["matrix"]; matrix2.ID = json1["id"]; matrix2.dim = json1["dimension"]; matrix2.data = &v1[0]; cout << to_string(matrix2.ID) << endl; cout << "debug 2" << endl; Matrix result(matrix1.dim); cout << "dim for result" << to_string(result.dim) << endl; cout << "debug 3" << endl; result = run(mult_strassen, matrix1, matrix2); cout << "debug 4"; `````` Mario Bajer committed May 08, 2020 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 `````` json json3; srand(time(NULL)); result.ID = rand() % 100; string folderpath = "Json/"; string testpath = folderpath + to_string(result.ID); while(existsm(testpath)){ cout << "

" << "File mit ID: " << result.ID << " existiert bereits!" << "

"; result.ID = rand() % 100; testpath = folderpath + to_string(result.ID); } folderpath += to_string(result.ID) + ".json"; json3["id"] = result.ID; json3["dimension"] = result.dim; int size = result.dim * result.dim; vector v(result.data, result.data + size); json3["matrix"] = v; ofstream o; o.open(folderpath); o << json3 << endl; o.close(); // result.generateMatrix(result.dim); `````` Mario Bajer committed May 08, 2020 165 166 167 `````` cout << "Resulting Matrix saved at ID: " + to_string(result.ID) << endl; cout << "
" << endl; `````` Mario Bajer committed May 08, 2020 168 `````` cout << "Back to Index"; `````` Mario Bajer committed May 08, 2020 169 170 171 172 `````` cout << "\n"; cout << "\n"; return 0; }``````