Load and display the file gotoex.c
for
an example of a file with some "goto" statements in
it.
main()
{
int dog,cat,pig;
goto real_start;
some_where:
printf("This is
another line of the mess.\n");
goto stop_it;
/* the following
section is the only section with a useable goto */
real_start:
for(dog = 1;dog <
6;dog++) {
for(cat = 1;cat <
6;cat++) {
for(pig = 1;pig <
4;pig++) {
printf("Dog = %d
Cat = %d Pig = %d\n",dog,cat,pig);
if ((dog + cat + pig)
> 8 ) goto enough;
};
};
};
enough:
printf("Those are enough animals for now.\n");
/* this is the end of
the section with a useable goto statement */
printf("\nThis is
the first line out of the spaghetti code.\n");
goto there;
where:
printf("This is
the third line of the spaghetti code.\n");
goto some_where;
there:
printf("this is
the second line of the spaghetti code.\n");
goto where;
stop_it:
printf("This is
the last line of the mess.\n");
}
To use a "goto"
statement, you simply use the reserved word "goto", followed by the
symbolic
name to which you wish to jump.
The name is then placed anywhere in the program followed
by a colon. You are not allowed
to jump into any loop, but you are allowed to jump out of a
loop. Also, you are not allowed
to jump out of any function into another. These attempts will
be flagged by your compiler as an
error if you attempt any of them.
