The enclosed patch adds some const qualifiers to function arguments, and changes long's to time_t's as appropriate. --jtc diff -c -r1.3 -r1.4 *** newctime.3 1995/03/10 00:05:54 1.3 --- newctime.3 1995/03/10 00:09:36 1.4 *************** *** 11,17 **** .B #include <sys/types.h> .PP .B char *ctime(clock) ! .B time_t *clock; .PP .B double difftime(time1, time0) .B time_t time1; --- 11,17 ---- .B #include <sys/types.h> .PP .B char *ctime(clock) ! .B const time_t *clock; .PP .B double difftime(time1, time0) .B time_t time1; *************** *** 20,32 **** .B #include <time.h> .PP .B char *asctime(tm) ! .B struct tm *tm; .PP .B struct tm *localtime(clock) ! .B long *clock; .PP .B struct tm *gmtime(clock) ! .B long *clock; .PP .B time_t mktime(tm) .B struct tm *tm; --- 20,32 ---- .B #include <time.h> .PP .B char *asctime(tm) ! .B const struct tm *tm; .PP .B struct tm *localtime(clock) ! .B const time_t *clock; .PP .B struct tm *gmtime(clock) ! .B const time_t *clock; .PP .B time_t mktime(tm) .B struct tm *tm;