l33.1a

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 1A 代码 · 共 24 行

#print
Write a main program which counts the number of command-line arguments
it has which begin with the letter 'b'.  Print the
result in decimal.  Compile and test it as usual.
Then type "ready".
#user
a.out abc bcd efg rpq b bbvd  >xxx
grep 3 xxx >/dev/null
#succeed
/*  a possible solution */
main(argc, argv)
char *argv[];
{
	int i, k;

	for(i=k=0; i<argc; i++)
		if (argv[i][0] == 'b')
			k++;
	printf("%d\n", k);
}
#log
#next
37.1a 10