c - segmentation fault and argv, argc -


i made code prints out input:

  int main(int argc, char *argv[]) {     printf("%c", *argv[1]);     return 0; }

when put ab, abcdef, ac, *cf, works well, when put ** or $$ returns 2, , when put $a, $k, , on, generates segmentation error. wonder why doesn't print out letters put.

assuming you're running linux or other kind of unix flavour, $a refers environment variable a. expanded shell, , since didn't set value, becomes empty.

to literal string $a, you'll have escape argument - depending on shell you're using, try single or double quotes or escaping $ backslash \.


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