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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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typedef struct {
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float* values;
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int* rowIndex;
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int* colIndex;
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int nonZeroCount;
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} SparseMatrix;
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void sparse_matmul(SparseMatrix A, SparseMatrix B, SparseMatrix* C) {
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int rowsA = A.rowIndex[A.nonZeroCount];
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int colsA = A.colIndex[A.nonZeroCount];
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int rowsB = B.rowIndex[B.nonZeroCount];
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int colsB = B.colIndex[B.nonZeroCount];
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if (colsA != rowsB) {
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printf("ά<EFBFBD>Ȳ<EFBFBD>ƥ<EFBFBD>䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>о<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˷<EFBFBD><EFBFBD><EFBFBD>\n");
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return;
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}
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C->nonZeroCount = 0;
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C->values = (float*)malloc(sizeof(float) * (rowsA * colsB));
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C->rowIndex = (int*)malloc(sizeof(int) * (rowsA * colsB));
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C->colIndex = (int*)malloc(sizeof(int) * (rowsA * colsB));
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for (int i = 0; i < A.nonZeroCount; i++) {
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for (int j = 0; j < B.nonZeroCount; j++) {
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if (A.colIndex[i] == B.rowIndex[j]) {
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float val = A.values[i] * B.values[j];
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int row = A.rowIndex[i];
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int col = B.colIndex[j];
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// <20><><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7>Ѿ<EFBFBD><D1BE><EFBFBD><EFBFBD>ڸ<EFBFBD>Ԫ<EFBFBD><D4AA>
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int exists = 0;
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for (int k = 0; k < C->nonZeroCount; k++) {
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if (C->rowIndex[k] == row && C->colIndex[k] == col) {
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C->values[k] += val;
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exists = 1;
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break;
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}
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}
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if (!exists) {
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C->values[C->nonZeroCount] = val;
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C->rowIndex[C->nonZeroCount] = row;
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C->colIndex[C->nonZeroCount] = col;
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C->nonZeroCount++;
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}
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}
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}
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}
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}
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int main() {
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// ʾ<><CABE><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϡ<EFBFBD><CFA1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>A<EFBFBD><41>B<EFBFBD><42><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>sparse_matmul<75><6C><EFBFBD><EFBFBD>
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// ע<>⣺<EFBFBD><E2A3BA><EFBFBD><EFBFBD>ʡ<EFBFBD><CAA1><EFBFBD><EFBFBD>ϡ<EFBFBD><CFA1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EBA3AC><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD>ʵ<EFBFBD><CAB5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC>
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SparseMatrix A, B, C;
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// <20><>ʼ<EFBFBD><CABC>A<EFBFBD><41>B...
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clock_t start = clock();
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sparse_matmul(A, B, &C);
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clock_t end = clock();
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printf("ϡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˷<EFBFBD><EFBFBD><EFBFBD>ʱ: %lf <20><><EFBFBD><EFBFBD>\n", 1000.0 * (end - start) / CLOCKS_PER_SEC);
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// <20><><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>...
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return 0;
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}
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