[unix-history] / usr / src / usr.lib / learn / C / L5.1c

#print
(Section 1.5)
Write a program which reads one character from
its input; if that character is ? it prints "yes",
otherwise it prints "no".
Compile it, test it, and then type ready.
#once #create Ref1
? is here
#once #create Ref2
no ? at beginning
#user
a.out <Ref1 >test1
a.out <Ref2 >test2
grep yes test1 >/dev/null || grep no test2 >/dev/null
#succeed
This is one possible solution

main()
{
	if (getchar() == '?')
		printf("yes\n");
	else
		printf("no\n");
}

The indenting and general formatting of C programs
should be done so you make the structure clear,
like the code above.
#log
#next
5.1d 10
Commit	Line	Data
2e8921b7 C	1	#print
	2	(Section 1.5)
	3	Write a program which reads one character from
	4	its input; if that character is ? it prints "yes",
	5	otherwise it prints "no".
	6	Compile it, test it, and then type ready.
	7	#once #create Ref1
	8	? is here
	9	#once #create Ref2
	10	no ? at beginning
	11	#user
	12	a.out <Ref1 >test1
	13	a.out <Ref2 >test2
	14	grep yes test1 >/dev/null \|\| grep no test2 >/dev/null
	15	#succeed
	16	This is one possible solution
	17
	18	main()
	19	{
	20	if (getchar() == '?')
	21	printf("yes\n");
	22	else
	23	printf("no\n");
	24	}
	25
	26	The indenting and general formatting of C programs
	27	should be done so you make the structure clear,
	28	like the code above.
	29	#log
	30	#next
	31	5.1d 10