使用scanf()函数时,在源程序开头必须写预处理命令( )
A: include
B: include
C: include
D: include
A: include
B: include
C: include
D: include
举一反三
- 使用scanf()函数时,在源程序开头必须写预处理命令( ) A: B: include <stdio.h> C: D: include <stdio > E: include <stdio.h> F: G: include <scanf.h>
- 使用库函数前包含头文件stdio。h的正确命令是( )。 A: @include<stdio.h> B: #include<stdio.h> C: #include stdio.h D: #include”stdio.h”
- 使用scanf()函数时,在源程序开头必须写预处理命令() A: #include B: #include C: include D: #include
- 使用scanf()和printf()函数时,必须在程序开头加上预处理命令()。 A: #include B: #include C: #include D: #include
- 用scanf和printf函数时要用以下哪个语句导入头文件? A: include<std.h> B: include<stdio.h> C: define<stdio.h> D: include stdio.h