Added example program

man3/strftime.3

@@ -318,6 +318,51 @@ const struct tm *tm) {
 .br
 }
 .RE
+.SH EXAMPLE
+The program below can be used to experiment with 
+.BR strftime ().
+.nf
+
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+main(int argc, char *argv[])
+{
+    char outstr[200];
+    time_t t;
+    struct tm *tmp;
+
+    t = time(NULL);
+    tmp = localtime(&t);
+    if (tmp == NULL) {
+        perror("localtime");
+        exit(EXIT_FAILURE);
+    }
+
+    if (strftime(outstr, sizeof(outstr), argv[1], tmp) == 0) {
+        fprintf(stderr, "strftime returned 0");
+        exit(EXIT_FAILURE);
+    }
+
+    printf("Result string is \\"%s\\"\\n", outstr);
+    exit(EXIT_SUCCESS);
+} /* main */
+.fi
+.PP
+Some examples of the result string produced by the glibc implementation of
+.BR strftime () 
+are as follows:
+.nf
+
+$ ./a.out "%m"
+Result string is "11"
+$ ./a.out "%5m"
+Result string is "00011"
+$ ./a.out "%_5m"
+Result string is "   11"
+.fi
 .SH "SEE ALSO"
 .BR date (1),
 .BR time (2),