Shell Programming and Scripting

echo | awk ' 
        BEGIN{
            A1[1]="foo1"
            A2[1]="foo2"
            A3[1]="foo3"
             }

        function test1(a,b,c){
                    print a,b,c
                     }
        function test2(a,b,c){
                    print b[1]
                     }
        {
        for(i=1;i<=4;i++)
                test1(i,"A"i,"B"i+1)
                test2(i,"A"i,"B"i+1)
        }'

sh test.sh 
1 A1 B2
2 A2 B3
3 A3 B4
4 A4 B5
awk: cmd. line:11: (FILENAME=- FNR=1) fatal: attempt to use scalar parameter `b' as an array

 

                test1(i,"A"i,"B"i+1);
                split("hi:aa:ab",c,":");
                test2(i,c,"B"i+1);

BIGIN

A1[1],A2[1]..

print a,b,c

array c contains index 1....n , that is c[1],c[2]...c[n]

array c1[1]..c2[1]...c5[1]....cn[1]

test2(i,A1,"B"i+1)
test2(i,A2,"B"i+1)
test2(i,A3,"B"i+1)
test2(i,A4,"B"i+1)

echo | awk ' 
        BEGIN{
            A[0,1]="foo1"
            A[0,2]="foo2"
            A[0,3]="foo3"
             }

        function test2(a,b,c){
                    print b[0,a]
                     }
        {
        for(i=1;i<=4;i++)
                test2(i,A,"B"i+1)
        }'

sh test.sh 
foo1
foo2
foo3