diff options
Diffstat (limited to 'numericx.c')
| -rw-r--r-- | numericx.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/numericx.c b/numericx.c index 792a4c3..87cde70 100644 --- a/numericx.c +++ b/numericx.c @@ -97,6 +97,13 @@ main(int argc, char* argv[]) { program_name = argv[0]; + /* argument processing */ + if( !(argc == 2) ) + { + fprintf(stderr, "usage: %s <number>\n", program_name); + exit(EXIT_FAILURE); + } + /* Numeral System variables from MACROS */ char* from = malloc( (strlen(FROM_NUMERICALS) + 1) * sizeof(char) ); char* to = malloc( (strlen(TO_NUMERICALS) + 1) * sizeof(char) ); |