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  1. #include <stdio.h>
  2. #include <math.h>
  3. #include <stdio.h>
  4. static char msg[]="Hi,HelLow World!";
  5. char * strValFunc(int pos){return &(msg[pos]);}
  6. double *doublePtrFunc(double * d){return d;}
  7. int charArgFunc(char ch){return ch;}
  8.  
  9. int main(void) {
  10. 	{//(1) :pattern "a(*b)[c];" :  "double (*g)[*q];" :  "char v=strValFunc(*q)[*r];"
  11. 		int p=3;
  12. 		int *q=&p;
  13. 		{
  14. 			double f[4][*q];
  15. 			double (*g)[*q];  //pattern "a(*b)[c];"
  16. 			f[2][1]=3.14;
  17. 			g=(void *)&f;
  18. 			(*g)[1]= (f[2][1]);
  19. 			printf("%g\n",(*g)[1]);
  20. 		}
  21. 		{
  22. 			int *r=q;
  23. 			char v=
  24. 				strValFunc(*q)[*r]; //pattern "a(*b)[*c];"
  25. 			printf("%c\n",v);  
  26. 			printf("%d %c\n",*q,msg[3+3]);
  27. 		}
  28. 	}
  29. 	{ //(2): pattern "a(*b(*c));" : "(double*) doublePtrFunc(*r);" : "double *yPtr=(double *) doublePtrFunc(*r);"
  30. 		double p=3.14159265;
  31. 		double *q= &p;
  32. 		double **r= &q;
  33. 		{
  34. 			(double*) doublePtrFunc(*r);  //pattern a(*b(*c));"
  35. 		//	g= & doubleFunc;
  36. 			printf("%g\n",*doublePtrFunc(&p));
  37. 		}
  38. 		{
  39. 			double *yPtr=
  40. 				(double *) doublePtrFunc(*r); //pattern a(*b(*c));
  41. 			printf("%g \n",*yPtr);
  42. 		}
  43. 	}
  44. 	{ //(3): pattern "a(*b[c]);" : "char (*g[*q]);" : "int *r=q; char * strPtrArr[*q+1];" 
  45. 		int p=3;
  46. 		int *q=&p;
  47. 		{
  48. //			int  val[*q*2]; // allocate void area. variable-sized object may not be initialized
  49.     		char (*g[*q]);  //pattern "a(*b[c]);"
  50. 			g[1]= &msg[*q];
  51. 			printf("%c\n",(*g[1]));
  52. 		}
  53. 		{
  54. 			int *r=q;
  55. 			char * strPtrArr[*q+1];
  56. 			strPtrArr[*r]= (char *)&msg;
  57. 			int v=
  58. 				charArgFunc(*strPtrArr[*r]); //pattern "a(*b[*c]);"
  59. 			printf("%c\n",v);  
  60. 			printf("%d %c\n",*q,msg[3+3]);
  61. 		}
  62. 	}
  63. 	{// pattern a[*b][*c];" 失格
  64. 		int m=3,n=4;
  65. 		int *p= &m,*q=&n;
  66. 		{
  67. 			int a= -1,b= -2, // 左記の宣言に続く、宣言文の一部
  68. 			integerDynamicArr[*p][*q];  //pattern a[*b][*c];　完結した宣言文ではない
  69. 			int i,j;
  70. 			for(i=0;i<*p;i++)for(j=0;j<*q;j++) integerDynamicArr[i][ j]=100*i+j;
  71.  
  72. 			for(i=0;i<*p;i++){
  73. 				for(j=0;j<*q;j++) printf("%3d\t",integerDynamicArr[i][j]);
  74. 				printf("\n");	
  75. 			}
  76. 			int u=
  77. 				integerDynamicArr[*p][*q];  //pattern a[*b][*c];"
  78. 			printf("%d %d %d \n",u,a,b);
  79. 			printf("%p %p %p %p %p \n",(void*)&integerDynamicArr[*p][*q],(void *)&a,(void *)&b,(void *)&i,(void *)&j);
  80. 		}
  81. 	}
  82. 	return 0;
  83. }
Success #stdin #stdout 0s 2112KB
comments (?)
stdin
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Standard input is empty
stdout
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3.14
L
3 L
3.14159
3.14159 
H
H
3 L
  0	  1	  2	  3	
100	101	102	103	
200	201	202	203	
0 -1 -2 
0xbfac9d30 0xbfac9d54 0xbfac9d50 0xbfac9d4c 0xbfac9d48
https://ideone.com/j2vf1n
C 言語の文法チェック1-4
language:
C99 (gcc 8.3)
created:
8 years ago
visibility:
public

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