Describe the mistake in this code snippet char* x; strncpy(x, “Hello”, strlen(“H

Question

Describe the mistake in this code snippet

char* x;

strncpy(x, “Hello”, strlen(“Hello”)+1);
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Describe the mistake in this code snippet

char* x = “Hello!”;

strncpy(x, “Hello.”, strlen(“Hello.”)+1);
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Describe the mistake in this code snippet

char* x = “This is a test”;

char* y = “This is another test”;

char* token = strtok(x, “ “); // Expecting ”This”

char* token2 = strtok(y, ” ”); // Expecting “This”

char* token3 = strtok(x, ” ”); // Expecting “is”

Explanation / Answer

char* x;
strncpy(x, “Hello”, strlen(“Hello”)+1);
memory is not allocated for *x which may cause segmentation fault!

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char* x = “Hello!”;
strncpy(x, “Hello.”, strlen(“Hello.”)+1);

The function will try to copy 6+1 characters in a space of 5+1 char
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char* x = “This is a test”;

char* y = “This is another test”;
char* token = strtok(x, “ “); // Expecting ”This”
char* token2 = strtok(y, ” ”); // Expecting “This”
char* token3 = strtok(x, ” ”); // Expecting “is” /*

char* token3 = strtok(NULL, ” ”); // Expecting “is” /* this is correct

*/

Will not provide the expecting outout"is" since we reset strtok by sending a (new) string to the method. If we had passed NULL instead of x, we would have gor that result

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