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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. void stringrev(char*s1)
  5. {
  6. 	char *start;
  7. 	char *end;
  8. 	if (s1==NULL)
  9. 	{
  10. 		return;
  11. 	}
  12. 	start=s1;
  13. 	char *temp;
  14. 	end=start+strlen(s1)-1;
  15. 	while (start<end)
  16. 	{
  17. 		*temp=*end;
  18. 		*end=*start;
  19. 		*start=*temp;
  20. 		start ++;
  21. 		end--;
  22. 	}
  23. }
  24.  
  25. int stringcomp(char*s1,char*s2)
  26. {
  27. 	if(s1==NULL && s2==NULL)
  28. 	{
  29. 		return 0;
  30. 	}
  31. 	if(s1==NULL || s2==NULL)
  32. 	{
  33. 		return -1;
  34. 	}
  35. 	while(*s1==*s2)
  36. 	{
  37.  
  38. 		if(*s1=='\0')
  39. 		{
  40. 			return 0;
  41. 		}
  42. 		s1++;
  43. 		s2++;
  44. 	}
  45. 	return (*s1-*s2);
  46. }
  47.  
  48. int main()
  49. {
  50. 	//Test cases for string reverse
  51. 	char test[1000]="abcdef";
  52. 	stringrev(test);
  53. 	if (stringcomp(test,"fedcba")==0)
  54. 	{
  55. 		printf("Test 1 Passed\n");
  56. 	}
  57. 	else
  58. 		printf("Test 1 Failed\n");
  59.  
  60. 	strcpy(test,"");
  61. 	stringrev(test);
  62. 	if (stringcomp(test,"")==0)
  63. 	{
  64. 		printf("Test 2 Passed\n");
  65. 	}
  66. 	else
  67. 		printf("Test 2 Failed\n");
  68.  
  69.  
  70. 	stringrev(NULL);
  71. 	printf("Test 3 passed\n");
  72.  
  73. 	strcpy(test,"123@rf^");
  74. 	stringrev(test);
  75. 	if (stringcomp(test,"^fr@321")==0)
  76. 	{
  77. 		printf("Test 4 Passed\n");
  78. 	}
  79. 	else
  80. 		printf("Test 4 Failed\n");
  81.  
  82. 	strcpy(test," a b c ");
  83. 	stringrev(test);
  84. 	if (stringcomp(test," c b a ")==0)
  85. 	{
  86. 		printf("Test 5 Passed\n");
  87. 	}
  88. 	else
  89. 		printf("Test 5 Failed\n");
  90.  
  91. 	memset(test,0,10);	
  92. 	strncpy(test,"abcd",4);
  93. 	stringrev(test);
  94. 	if (stringcomp(test,"dcba")==0)
  95. 	{
  96. 		printf("Test 6 Passed\n");
  97. 	}
  98. 	else
  99. 		printf("Test 6 Failed.Returned string is %s\n",test);
  100. 	char test2[1000];
  101. 	memset(test,'c',400);
  102. 	memset(test+400,'b',400);
  103. 	test[800]='\0';
  104. 	memset(test2,'b',400);
  105. 	memset(test2+400,'a',400);
  106. 	test2[800]='\0';
  107. 	stringrev(test);
  108. 	if (stringcomp(test,test2)==0)
  109. 	{
  110. 		printf("Test 7 Passed\n");
  111. 	}
  112. 	else
  113. 		printf("Test 7 Failed\n");
  114. 	//Test cases for string Compare
  115. 	/*if (stringcomp("aaa","aaa")==0)
  116. 		printf("Test 1 Passed");
  117. 	else
  118. 		printf("Test 1 Failed");
  119.  
  120. 	if (stringcomp("  aba","  aba")==0)
  121. 		printf("Test 2 Passed");
  122. 	else
  123. 		printf("Test 2 Failed");
  124.  
  125. 	if (stringcomp("","")==0)
  126. 		printf("Test 2 Passed");
  127. 	else
  128. 		printf("Test 2 Failed");
  129. 	if (stringcomp("","aba")==-1)
  130. 		printf("Test 2 Passed");
  131. 	else
  132. 		printf("Test 2 Failed");
  133. 	if (stringcomp("aba","")==0)
  134. 		printf("Test 2 Passed");
  135. 	else
  136. 		printf("Test 2 Failed");
  137. 	if (stringcomp("  aba","  aba")==0)
  138. 		printf("Test 2 Passed");
  139. 	else
  140. 		printf("Test 2 Failed");
  141. 	*/
  142. 	return 0;
  143. }
Success #stdin #stdout 0s 5448KB
comments (?)
stdin
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Standard input is empty
stdout
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Test 1 Passed
Test 2 Passed
Test 3 passed
Test 4 Passed
Test 5 Passed
Test 6 Passed
Test 7 Failed
https://ideone.com/u8nvC8
language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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