Match the items in Group 1 with its corresponding description in Group 2.

A. C语言是一种结构化语言。
B. C语言语句简洁、紧凑，使用方便、灵活。
C语言程序易于移植。
D. 生成的目标代码质量低，运行效率低。

A.
B. include main(); { /*programming*/ printf("programming!\n"); }
C. 
D. include main() { /*/programming/*/ printf("programming!\n"); }
E. C.
F. include main() { /*programming*/ printf("programming!\n"); }
G. include main() { /*/*programming*/*/ printf("programming!\n"); }

A. 连接符
B. 大小写字母
C. 下划线
D. 数字字符

A. scanf(" %lf %lf %lf",&a, &b, &c );
B. scanf(" %f %f %f",&a, &b, &c );
C. scanf(" %lf %lf %lf",a, b, c );
D. scanf(" %lf %lf %lf" &a, &b, &c );