awk用while循环打印三角形,直角,空心直角,等腰,等腰空心

直角三角形 awk -f 'as1'

cat as1

BEGIN {
        i=1;
        while(i<=10) {
                j=1;
                while(j<=i) {
                        printf "x";
                        j++;
                }
                printf "\n";
                i++;
        }
}

直角空心三角形 awk -f 'as2'

cat as2

BEGIN {
        i=1;
        while(i<=10) {
                j=1;
                while(j<=i) {
                        if (j==1 || j==i || i==10)
                                printf "x";
                        else
                                printf " "
                        j++;
                }
                printf "\n";
                i++;
        }
}

等腰三角形 awk -f 'as3'

cat as3

BEGIN {
        i=1;
        while(i<=10) {
                j=1;
                while(j<=(10-i)) {
                        printf " ";
                        j++;
                }

                j=1;
                while(j<=(2*i-1)) {
                        printf "x";
                        j++;
                }
                printf "\n";
                i++;
        }
}

等腰空心三角形 awk -f 'as4'

cat as4

BEGIN {
        i=1;
        while(i<=10) {
                j=1;
                while(j<=(10-i)) {
                        printf " ";
                        j++;
                }

                j=1;
                while(j<=(2*i-1)) {
                        if (j==1 || j==(2*i-1) || i==10 )
                                printf "x";
                        else
                                printf " "
                        j++;
                }
                printf "\n";
                i++;
        }
}