Question

Write this function in c++.Use of string and <cstring> is not allowed .You are required to use char* and implement the use of ** in this question .

Gtest case to pass:

#include "q1.cpp"

#include <gtest/gtest.h>

//-------------------Q1_8-----------------

TEST(Question1_8, First) {

char t1[]="Hello World";

char res1[] = "Hello";

char res2[] = "World";

char** r= StrTok(t1,' ');

ASSERT_EQ(0, strcmp(r[0],res1) );

ASSERT_EQ(0, strcmp(r[1],res2) );

}

TEST(Question1_8, Second) {

char t1[]="Hello?World?OOP";

char res1[] = "Hello";

char res2[] = "World";

char res3[] = "OOP";

char** r= StrTok(t1,'?');

ASSERT_EQ(0, strcmp(r[0],res1) );

ASSERT_EQ(0, strcmp(r[1],res2) );

ASSERT_EQ(0, strcmp(r[2],res3) );

}

int main(int argc, char **argv) {

testing::InitGoogleTest(&argc, argv);

return RUN_ALL_TESTS();

}

1 char **Str Tok char *sl, const char s2) 2 / A call to Str Tok breaks stringsl into token' 3 (logical pieces such as words in a line of text) separated by character 4 contained in char 32*/ 5 { 6 }

pointer to pointer must be used

Answer 1

Hello,

Here is the code for the method using pointers. Kindly comment below in case of any queries.

Code:

char** StrTok(char* s1, const char s2)
{
   char *c_temp = new char[COL];       // Holds single string
   char **s_temp = new char*[ROW];       // Holds 2-D array of string
   char **dest = s_temp;               // Stores final output result

   *s_temp = c_temp;   // Pointer to current string

   // Iterate char by char
   while (*s1 != '\0')
   {
       if (*s1 == s2)       // Move to next row on delimiter match with current character
       {
           *c_temp = '\0';           // Complete the current string
           *s_temp++;               // Move to next row
           *s1++;                   // Skip the delimiter
           c_temp = new char[COL];   // Prepare the next string
           *s_temp = c_temp;       // Pointer to current string
           continue;
       }

       *c_temp = *s1;       // Copy single character
       *c_temp++, *s1++;   // Move to next character
   }

   *c_temp = '\0';       // Complete the current string

   return dest;       // Return the result string
}

Output:

test result: ok. 5 passed; O failed; _ ignored; measured; filtered out