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  1. #include <stdio.h>
  2.  
  3. typedef unsigned int Uint;
  4. #define N 100
  5. #define DP 15
  6. //RADIX == 10^LOG
  7. #define LOG 1
  8. #define RADIX 10
  9. typedef Uint Liczba[N+1];
  10.  
  11. void plus( Liczba a, Liczba b){                  // a[]:=a[]+b[]
  12. 	for( Uint c=0, i=N; i>0; i-- ){
  13. 		c += a[i]+b[i];
  14. 		a[i] = c % RADIX;
  15. 		c /= RADIX;}}
  16.  
  17. void minus( Liczba a, Liczba b ) {               // a[]:=a[]-b[]
  18. 	for( Uint c=0, i=N; i>0; i-- ){
  19. 		c += b[i];
  20. 		if( a[i]<c ){
  21. 			a[i] = RADIX + a[i] - c; c=1; }
  22. 		else {
  23. 			a[i] -= c; c=0; }}}
  24.  
  25. void razyU( Liczba a, Uint b ) {                 // a[]:=a[] * b
  26. 	for( Uint c=0,i=N; i>0; i-- ){
  27. 		c += a[i]*b;
  28. 		a[i]= c % RADIX;
  29. 		c /= RADIX; }}
  30.  
  31. int podzielU( Liczba a, Uint b ) {              // a[]:=a[] / b
  32. 	Uint z=0;
  33. 	for( Uint c=0, i=1; i<=N; i++ ) {
  34. 		c = c*RADIX+a[i];
  35. 		a[i]= c/b % RADIX; if( a[i] ) z=1;
  36. 		c = c - a[i]*b;}
  37. 	return z;}
  38.  
  39. void wstawU( Liczba a, Uint b ) {                // a[]:= b
  40. 	Uint i;
  41. 	for( i=0; i<=N; i++ ) a[i]=0;
  42. 	i=DP;
  43. 	while( b ) {
  44. 		a[i--] = b%RADIX; b /= RADIX; }}
  45.  
  46. void atan( Liczba a, Uint x ) {                  // a[]:= atan( 1/x )
  47. 	Liczba w; Uint z, n=3;
  48. 	wstawU( w, 1 ); wstawU( a, 1 ); podzielU(a, x);
  49. 	do {
  50. 		x *= x*x; z=podzielU( w, x*n ); n += 2;minus( a, w );
  51. 		x *= x*x; z=podzielU( w, x*n ); n += 2; plus( a, w );
  52. 	} while( z );}	
  53.  
  54. void pisz( Liczba a ){ Uint i;
  55. 	for( i=1; i<=DP && !a[i]; i++ ) printf("%*s", LOG,"");
  56. 	printf("%*u", LOG, a[i]);
  57. 	for( i++; i<=DP; i++ ) printf("%0*u", LOG, a[i]);
  58. 	putchar('.');
  59. 	for(    ; i<=N; i++ ) printf("%0*u", LOG, a[i]); }
  60.  
  61. int main(void) {
  62. 	Liczba a;
  63. 	wstawU(a, 12); 
  64. 	razyU(a, 125); pisz(a); puts("");
  65. 	podzielU(a, 77); pisz(a); puts("");
  66. 	printf("\n%0.14f\n", 12.0*125/77.0);
  67. 	return 0;
  68. }
  69.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
cc1: warnings being treated as errors
prog.c:46: error: conflicting types for built-in function ‘atan’
stdout
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Standard output is empty
https://ideone.com/CM5s8
language:
C99 (gcc 8.3)
created:
14 years ago
visibility:
public

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