assign value to string

Hey ,i was trying to assign a value to a string.

For example lets say: int X; x=10;
then when we do X=40, the value 40 overwrites the value 10;

SO I was doing the same for string.
my code was :

Code:

char *temp;

temp=" ";

temp[0]='a';     temp[1]='r';    temp[2]='t';     temp[3]='\0';
printf("\n*%s--------->length is %d",temp,strlen(temp));

temp=" ";
temp[0]='i';     temp[1]='t';  temp[2]='\0';
printf("\n*%s--------->length is %d",temp,strlen(temp));

return 1;

In unix it compiles without errors:but crashes when you run it.

Was using gcc -ansi -pedantic -Wall -o runFile test.c


though In Microsoft visual c++ 2003 it compiles and runs and in dev c it compiles but cant run.

CAN SOME ONE HELP ME CORRECT MY MISTAKE ABOUT SO IT CAN RUN IN UNIX ?
thanx alot

You have to reserve a memory for temp with malloc(), and free it at the end of the program. Without this, temp is a dangling pointer, and program crashes. Or, you can declare temp as an array.

> temp=" ";
It is implementation specific as to whether strings are writable
If they are, then you can change them with temp[0] = 'a';
If they are not, then you get a segfault.

In any event, your other temp assignments beyond temp[1] are out of bounds.

Stick to
char temp[10];
until you're more comfortable with pointers.

wow that class on data structures must be work ing i actually understand how to do that without having to just use char temp[10]

ya just use that for now easiest to start with