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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. typedef struct 
  5. {
  6. 	size_t rows,cols;
  7. 	double *data;
  8. } Matrix;
  9.  
  10. Matrix makeMatrix(size_t rows,size_t cols)
  11. {
  12. 	Matrix m={rows,cols,0};
  13. 	m.data=(double*)malloc(rows*cols*sizeof(double));
  14. 	return m;
  15. }
  16.  
  17. double *valueMatrix(Matrix *m,size_t r,size_t c)
  18. {
  19. 	return &m->data[r*m->cols+c];
  20. }
  21.  
  22. void showMatrix(Matrix *m)
  23. {
  24. 	size_t r,c;
  25. 	for(r=0;r<m->rows;++r,printf("\n")) for(c=0;c<m->cols;++c) printf("\t%7.2lf"+!c,*valueMatrix(m,r,c));
  26. }
  27.  
  28. void scanMatrix(Matrix *m)
  29. {
  30. 	size_t r,c;
  31. 	for(r=0;r<m->rows;++r) for(c=0;c<m->cols;++c) scanf("%lf",valueMatrix(m,r,c));
  32. }
  33.  
  34. void freeMatrix(Matrix *m)
  35. {
  36. 	free(m->data);
  37. 	memset(m,sizeof(Matrix),0);
  38. }
  39.  
  40. int main()
  41. {
  42. 	Matrix m=makeMatrix(3,4);
  43. 	scanMatrix(&m);
  44. 	showMatrix(&m);
  45. 	freeMatrix(&m);
  46. 	return 0;
  47. }
Success #stdin #stdout 0s 5704KB
comments (?)
stdin 
1 2 3 4
3 4 5 6
5 6 7 8
stdout 
   1.00	   2.00	   3.00	   4.00
   3.00	   4.00	   5.00	   6.00
   5.00	   6.00	   7.00	   8.00
https://ideone.com/AiukJA
language:
C (gcc 8.3)
created:
2 years ago
visibility:
public

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