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the usage of strtok() in c shows warnings and returns segmentation fault(core dumped)


the usage of strtok() in c shows warnings and returns segmentation fault(core dumped)

By : user6020900
Date : October 20 2020, 06:10 AM
help you fix your problem I am learning C string operations and was using strtok() function. My code ended up with warning and then output was segmentation fault. , That's was a mistake just replace
code :
strtok(str,'.');
strtok(str,".");


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c++ strtok segmentation fault (core dumped)

c++ strtok segmentation fault (core dumped)


By : Mike K
Date : March 29 2020, 07:55 AM
Does that help I get segmentation fault (core dumped) when I run this code.
code :
while (command1 != NULL)
int i = 0;
command1[i] = strtok (firstAns, " ");
while (command1[i] != NULL)
    command1[++i] = strtok (NULL, " ");       
I am getting a segmentation fault core dumped when using strtok

I am getting a segmentation fault core dumped when using strtok


By : TH30
Date : March 29 2020, 07:55 AM
I hope this helps . I am trying to read numbers from a csv file, then pass those into a char*[] that I called pTokens. Everything seems to work fine, as in the char *[] gets populated, but when I try to access an element from the array, I get a segmentation fault. (It also seems to crash when I try and manually input the file name, hence why it is commented out. But that's a problem for another time.) , Me being a noob to C is showing. I forgot to put
code :
#include <string.h> 
Segmentation fault core dumped using strtok

Segmentation fault core dumped using strtok


By : twellman
Date : March 29 2020, 07:55 AM
will be helpful for those in need You are calling myscanf with a string literal ("@2%d"), myscanf calls str_split with it, str_split will call strtok and strtok tries to write to it, which is not allowed.
A simple solution would be to create a buffer
code :
char buffer[] = "@2%d";
myscanf(buffer, &x);
Segmentation fault (core dumped) in strtok

Segmentation fault (core dumped) in strtok


By : Adrian Marius
Date : March 29 2020, 07:55 AM
To fix this issue strtok modifies the argument, str points to a string literal, modifying a string literal causes undefined behavior. Initializing a non-const char* with a string literal is in fact deprecated.
When you write str[], str becomes a mutable array initialized with the string.
Segmentation fault (core dumped) when i trying use strtok in C

Segmentation fault (core dumped) when i trying use strtok in C


By : Valdae
Date : September 26 2020, 08:00 AM
hop of those help? The strtok function modifies the string it tokenizes. You're passing in a pointer to a string literal, and string literals are read only. Attempting to modify them invokes undefined behavior which in this case causes a crash.
Change line to an array so that it can be modified.
code :
char line[]="abc\tabc";
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