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  1. #include <stdio.h>
  2.  
  3. double sum_tab(double tab[], size_t tsize);
  4. void print_tab(double tab[], size_t tsize);
  5.  
  6. int main(void) {
  7. 	double X = 234.234324;
  8. 	double tab_in[] = { 2, -0.01, 100, 1 };
  9. 	size_t tsize = sizeof(tab_in)/sizeof(double);
  10. 	double tab_out[tsize], tab_tmp[tsize];
  11.  
  12. 	for(size_t i=0;i<tsize;++i) { tab_out[i] = X/tsize; }
  13. 	for(size_t i=0;i<tsize;++i) { tab_tmp[i] = tab_out[i]*tab_in[i]; }
  14. 	double sum = sum_tab(tab_tmp, tsize);
  15.  
  16. 	if(sum) {
  17. 		double ratio = X/sum;
  18. 		for(size_t i=0;i<tsize;++i) { tab_out[i] = tab_tmp[i]*ratio; }
  19. 	}
  20.  
  21. 	puts("in_tab:");
  22. 	print_tab(tab_in, tsize);
  23.  
  24. 	printf("\nX=%5.5f\n", X);
  25. 	puts("out_tab:");
  26. 	print_tab(tab_out, tsize);
  27. 	printf("suma=%5.5f\n", sum_tab(tab_out, tsize));
  28.  
  29.  
  30.  
  31.  
  32. 	return 0;
  33. }
  34. void print_tab(double tab[], size_t tsize) {
  35. 	for(size_t i=0;i<tsize;++i) {
  36. 		printf("%5.5f ", tab[i]);
  37. 		if((i%5)==4) { putchar('\n'); }
  38. 	}
  39. 	printf("\n");
  40. }
  41. double sum_tab(double tab[], size_t tsize) {
  42. 	double sum = 0;
  43. 	for(size_t i=0;i<tsize;++i) { sum += tab[i]; }
  44. 	return sum;
  45. }
Success #stdin #stdout 0s 2168KB
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stdin
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Standard input is empty
stdout
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in_tab:
2.00000 -0.01000 100.00000 1.00000 

X=234.23432
out_tab:
4.54868 -0.02274 227.43405 2.27434 
suma=234.23432
https://ideone.com/tBFoKM
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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