用scanf和printf函数时要用以下哪个语句导入头文件?
A:
B: include<std.h>
C:
D: include<stdio.h>
E:
F: define<stdio.h>
G:
H: include stdio.h
A:
B: include<std.h>
C:
D: include<stdio.h>
E:
F: define<stdio.h>
G:
H: include stdio.h
举一反三
- 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: B: include <stdio.h> C: D: include <stdio > E: include <stdio.h> F: G: include <scanf.h>
- 使用scanf函数需要在头文件中添加___. A: B: include <stdio.h> C: D: include <ctype.h> E: F: include <float.h> G: include <iomanip.h>
- 用scanf和printf函数时要用以下哪个语句导入头文件() A: #include B: #include C: #define D: #include stdio.h
- 一个C语言源程序中如果调用了函数fabs,那必须有编译预处理命令( )。 A: B: include <stdio.h> C: D: include <math.h> E: F: include <ctype.h> G: H: include <stdlib.h>