You can use the strtok() function to split a string (and specify the delimiter to use). Note that strtok() will modify the string passed into it. If the original string is required elsewhere make a copy of it and pass the copy to strtok(). EDIT: Example (note it does not handle consecutive delimiters, “JAN,,,FEB,MAR” for example): Output:
If you pass -1 and WNOHANG, waitpid() will check if any zombie-children exist. If yes, one of them is reaped and its exit status returned. If not, either 0 is returned (if unterminated children exist) or -1 is returned (if not) and ERRNO is set to ECHILD (No child processes). This is useful if you want to find out if any of your children recently died without having … Read more
argv[1] is a pointer to a string. You can print the string it points to using printf(“%s\n”, argv[1]); To get an integer from a string you have first to convert it. Use strtol to convert a string to an int.
You defined is_Prime inside the body of main. This is not possible in C. Or alternately, you are missing a closing curly brace at the end of main‘s body. The other problem was already mentioned in shf301’s answer.
The compiler may add padding for alignment requirements. Note that this applies not only to padding between the fields of a struct, but also may apply to the end of the struct (so that arrays of the structure type will have each element properly aligned). For example: Even though the c field doesn’t need padding, the struct … Read more
I guess you want to make arrays of pointers instead of arrays of characters. Try this:
In C arrays are passed as a pointer to the first element. They are the only element that is not really passed by value (the pointer is passed by value, but the array is not copied). That allows the called function to modify the contents. Now, if what you want is changing the array itself … Read more
It looks like you are trying to free memory that has already been freed or was dereferenced. Link your program with efence or run it with valgrind. This will tell you where your pointer gets dereferenced.
C99 [$6.7.8/21] If there are fewer initializers in a brace-enclosed list than there are elements or members of an aggregate, or fewer characters in a string literal used to initialize an array of known size than there are elements in the array, the remainder of the aggregate shall be initialized implicitly the same as objects that have … Read more
memmove can handle overlapping areas, I would try something like that (not tested, maybe +-1 issue) Before: “abcdef” After: “abdef”