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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. typedef unsigned int Uint;
  5. #define N 100
  6. Uint DP=1;
  7. //RADIX == 10^LOG
  8. #define LOG 1
  9. #define RADIX 10
  10. typedef Uint Liczba[N+1];
  11.  
  12. void pisz( Liczba a, int ctrl){ Uint i;
  13. 	for( i=1; i<=DP && !a[i]; i++ ) printf("%*s", LOG,"");
  14. 	printf("%*u", LOG, a[i]);
  15. 	for( i++; i<=DP; i++ ) printf("%0*u", LOG, a[i]);
  16. 	putchar('.');
  17. 	for(    ; i<=N; i++ ) printf("%0*u", LOG, a[i]); 
  18. 	if( ctrl < 0 ) puts("");}
  19.  
  20. void plus( Liczba a, Liczba b){                  // a[]:=a[]+b[]
  21. 	for( Uint c=0, i=N; i>0; i-- ){
  22. 		c += a[i]+b[i];
  23. 		a[i] = c % RADIX;
  24. 		c /= RADIX;}}
  25.  
  26. void minus( Liczba a, Liczba b ) {               // a[]:=a[]-b[]
  27. 	for( Uint c=0, i=N; i>0; i-- ){
  28. 		c += b[i];
  29. 		if( a[i]<c ){
  30. 			a[i] = RADIX + a[i] - c; c=1; }
  31. 		else {
  32. 			a[i] -= c; c=0; }}}
  33.  
  34. void razyU( Liczba a, Uint b ) {                 // a[]:=a[] * b
  35. 	for( Uint c=0,i=N; i>0; i-- ){
  36. 		c += a[i]*b;
  37. 		a[i]= c % RADIX;
  38. 		c /= RADIX; }}
  39.  
  40. int podzielU( Liczba w, Liczba a, Uint b ) {     // w[]:=a[] / b
  41. 	Uint z=0;                                // return w[] != 0
  42. 	for( Uint c=0, i=1; i<=N; i++ ) {
  43. 		c = c*RADIX+a[i];
  44. 		w[i]= c/b % RADIX; if( w[i] ) z=1;
  45. 		c = c - w[i]*b;}
  46. 	return z;}
  47.  
  48. void wstawU( Liczba a, Uint b ) {                // a[]:= b
  49. 	Uint i;
  50. 	for( i=0; i<=N; i++ ) a[i]=0;
  51. 	i=DP;
  52. 	while( b ) {
  53. 		a[i--] = b%RADIX; b /= RADIX; }}
  54.  
  55. void atg( Liczba a, Uint x ) {                  // a[]:= atan( 1/x )
  56. 	Liczba px;
  57. 	wstawU( px, 1 ); podzielU( px, px, x );
  58. 	wstawU( a,  0 ); plus    ( a, px );
  59. 	for( Uint n=1;   ; n++){
  60. 		Liczba b;
  61. 		podzielU( px, px, x*x );
  62. 		if( ! podzielU( b, px, 2*n + 1 ) )
  63. 			break;
  64. 		if( n & 1 ) mius( a, b );
  65. 		else plus( a, b );}}	            
  66.  
  67. int main(void) {
  68. 	Liczba a;
  69. 	atg( a, 5 );pisz( a, -1 ); 
  70. 	printf("\n%0.14f\n", atan(1/5.0 ));
  71. 	return 0;
  72. }
  73.  
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: In function ‘atg’:
prog.c:64: error: implicit declaration of function ‘mius’
stdout
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Standard output is empty
https://ideone.com/0AGU4
language:
C99 (gcc 8.3)
created:
14 years ago
visibility:
public

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