substr_count("Hello world.The world is nice","world",12,15);
1
举一反三
- substr_count("Hello world.The world is nice","world",12,15); A: 1 B: 2 C: 3 D: 4
- 若字符串 s = 'hello world'，则语句 s.ljust(15, '.') 和 s.rjust(15) 的输出结果为？ A: '....hello world'' hello world' B: 'hello world....'' hello world' C: 'hello world....''hello world ' D: 'hello world....''hello world'
- 阅读以下Shell程序，它的输出是_____________ #!/bin/sh echo "ok,nice" loop=0 for str in "hello world" do loop=$(($loop+1)) echo "The $loop loop:$str" done A: ok,nice The 2 loop:hello world B: ok,nice The 1 loop:hello world C: The 1 loop:hello world D: ok,nice
- 下列语句中，正确的是（）。 A: char*myString=“Hello—World！”； B: charmyString=“Hello—World！”； C: charmyString[11]=“Hello—World！”； D: charmyString[12]=“Hello—World！”；
- 该语句echo substr("Hello world",10)."<br>";打印结果为______(1)_______,该语句echo substr("Hello world",-10)."<br>";打印结果为______(2)_______,该语句echo substr("Hello world",-10,-2)."<br>";打印结果为____(3)________,
内容
- 0
下面代码的运行结果是（ ）。var str= "hello world" ;var str1=str.toUpperCase();var str2=str.toLowerCase() ;alert (str1) ;alert (str2) ; A: "HELLO WORLD","HELLO WORLD" B: "HELLO WORLD","hello world" C: "hello worl","HELLO WORLD" D: "hello world","hello world"
- 1
如何使用 PHP 输出 "hello world"？( ) A: "Hello World"; B: echo "Hello World"; C: Document.Write("Hello World"); D: console.log("Hello World");
- 2
执行下列语句后的显示结果是（ ）world="world"print("hello"+world) A: helloword B: "hello"world C: hello world D: "hello"+world
- 3
hello world='hello world'
- 4
print("hello"+"world")的输出结果是。 A: “hello”world B: hello world C: "hello"+world D: helloworld