hi
i just want to know that if i am using the following code in file a.c then how can i save/use the value returned by the main() function of this file in any other file say b.c
this fn. will return 10 to the console but how to use it?Code:int main() { int s=10; return s; }
I am not sure about saving it in the environment, as in in your shell. However, you can print it to stdout, and let b.c read from stdin. Then, you can pipe the output of a to stdin for b, with the pipeline character, like this: a | b.
-edit: You can also do it in the shell. $? is the variable for the exit value of the last command executed. Thus, , you can on the shell do this:
Google shell scripting for more info.Code:a //a finishes b $? //gives b the exit status of a as a paramter in argv.
Last edited by Silfer; 11-28-2005 at 11:52 AM.
-S
Code:itsme@itsme:~/C$ cat exitcode.c #include <stdio.h> #include <stdlib.h> #include <sys/wait.h> int main(void) { int status; status = system("./exitcode2"); if(status == -1) { puts("system() call failed"); return 1; } printf("Program 'exitcode2' returned code %d.\n", WEXITSTATUS(status)); return 0; }Code:itsme@itsme:~/C$ cat exitcode2.c int main(void) { return 10; }Code:itsme@itsme:~/C$ ./exitcode Program 'exitcode2' returned code 10. itsme@itsme:~/C$
If you understand what you're doing, you're not learning anything.
This could work, but is not guaranteed by the standard.
>This could work, but is not guaranteed by the standard.
The desired functionality is beyond the scope of the standard, so naturally any viable solution will be as well.
My best code is written with the delete key.
