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  1. //---------------------------------------------------------------------------
  2. //  以下の 3つのソース
  3. //    ・ipowruijo.h
  4. //    ・ipowruijo.c
  5. //    ・kadai143.c
  6. //  を用意し、
  7. //    $ gcc -o kadai143 -Wall  kadai143.c ipowruijo.c
  8. //  でビルドして kadai143 を作成
  9. //---------------------------------------------------------------------------
  10. // ipowruijo.h
  11. #ifndef __IPOWRUIJO_H__
  12. #define __IPOWRUIJO_H__
  13.  
  14. extern double ruijo(double y, int m);
  15. extern double ipow(double x, int n);
  16.  
  17. #endif//__IPOWRUIJO_H__
  18. // End of ipowruijo.h
  19. //---------------------------------------------------------------------------
  20. // ipowruijo.c
  21. #include "ipowruijo.h"
  22.  
  23. double ruijo(double y, int m)
  24. {
  25.     int i;
  26.     double mult;
  27.     mult = 1.0;
  28.     for (i = 0; i < m; i++) {
  29.         mult *= y;
  30.     }
  31.  
  32.     return mult;
  33. }
  34.  
  35. double ipow(double x, int n)
  36. {
  37.     double res;
  38.     int i;
  39.     if (n >= 0) {
  40.         res = ruijo(x, n);
  41.     } else {
  42.         res = 1.0 / ruijo(x, -n);
  43.     }
  44.  
  45.     return res;
  46. }
  47.  
  48. // End of ipowruijo.c
  49. //---------------------------------------------------------------------------
  50. // kadai143.c
  51. // 参考課題
  52.  
  53. #include <stdio.h>
  54. #include "ipowruijo.h"
  55.  
  56. int main()
  57. {
  58.     double num, ans;
  59.     int i;
  60.  
  61.     printf("整数を入力してください\n");
  62.     scanf("%lf", &num);
  63.  
  64.     for (i = -5; i <= 5; i++) {
  65.         ans = ipow(num, i);
  66.         printf("%f の %d 乗の値：%f\n", num, i, ans);
  67.     }
  68.  
  69.     return 0;
  70. }
  71.  
  72. // End of kadai143.c
  73. //---------------------------------------------------------------------------
  74.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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2.5
compilation info 
prog.c:21:23: error: ipowruijo.h: No such file or directory
prog.c: In function ‘ipow’:
prog.c:38: warning: unused variable ‘i’
prog.c: In function ‘main’:
prog.c:62: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result
stdout
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Standard output is empty
https://ideone.com/bWT8b2
language:
C (gcc 8.3)
created:
11 years ago
visibility:
secret

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