help me in awk


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# 1  
help me in awk

could any one tell me why the following code is not running when i m using
shell as interpreter but is running when i m using awk as interpreter

1 #!/bin/sh
2
3 awk '
4
5 {
6 if((index($1,"@") > 0))
7 {
8
9 i = index($1,"@");
10 printf("username is : %s\n",substr($1,1,i-1));
11 printf("site name is : %s\n",substr($1,i+1,length($1)));
12
13 }
14
15
16 }
17
18 '
~
~
~
but it is working when using
#!/bin/awk -f
# 2  
U have to use awk -f filename , if ur using shell interpreter

1 #!/bin/sh
2
3 awk '
4
5 {
6 if((index($1,"@") > 0))
7 {
8
9 i = index($1,"@");
10 printf("username is : %s\n",substr($1,1,i-1));
11 printf("site name is : %s\n",substr($1,i+1,length($1)));
12
13 }
14
15
16 }
17
18 '

--------------------
If you are using shell as interpreter.
U should use awk and then code
awk ' { if((index($1,"@") > 0))
ur code

}
'
filename

if ur keeping code in the file
code.awk should have
' { if((index($1,"@") > 0))
ur code
'
in shell u have to use
awk -f code.awk filename.txt
# 3  
still not working

but why the above code is not working
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