A: AA::float area()
B: float AA::area()
C: float AA:area()
D: Circle::area()
举一反三
- 下面程序的功能是:area函数计算圆的面积,main函数中调用area函数,计算给定半径的圆的面积,输出时显示两位小数。请填空。#include<stdio.h>#define PI 3.14 int main( ){______;float x = 2.4 , y ;y = area( x ) ; printf( "%6.2f\n" , y ) ;return 0 ;}float area ( float r ){float s ;s= PI * r * r ;_______;}
- 这是一个抽象方法的定义:abstract float area(){ ; }
- 以下对结构体类型变量的定义中,不正确的是( ) A.typedef struct aa { int n; float m; }AA; AA tdl; B.#define AA struct aa AA{ int n; float m; }tdl; C.struct { int n; float m; }aa; struct aa tdl; D.struct { int n; float m, }tdl;
- 以下对结构体类型变量的定义中,不正确的是( ) A: typedef struct aa {int n; float m; }AA; AA tdl; B: struct {int n; float m; }aa; struct aa tdl; C: D: define AA struct aa AA{int n; float m; }tdl; E: struct {int n; float m; }tdl;
- 以下对结构体类型变量的定义中,不正确的是()。 A: typedef struct aa { int n; AA float m; }AA; B: C: define AA struct aa {int n; float m; }td1; AA td1; D: struct { int n; float m; }aa; stuct aa td1; E: struct { int n; float m; }td1;
内容
- 0
以下对结构体类型变量的定义中,不正确的是____。A) typedef struct aa B) #define AA struct aa{ int n; AA { int n; float m; float m;}AA; }td1; AA td1; C) struct D) struct{ int n; { int n; float m; float m;}aa; }td1;stuct aa td1;
- 1
以下对结构体类型变量的定义中,不正确的是______。①typedef struct aa { int n; float m; }AA; AA td1; ②#define AA struct aa AA{ int n; float m; }td1; ③struct { int n; float m; }aa; struct aa td1; ④struct { int n; float m; }td1; A: ① B: ② C: ③ D: ④
- 2
改错: #include <stdio.h> void mian float a,b,area;//变量定义 a=1.9 b=3.6; area=a+b; printf(a=%f,b=%f,其面积=%f ",a,b,area);
- 3
以下对结构体类型变量td1的定义中,不正确的是( )。? struct aa;{;int n;;;float m;;};;struct aa td1;;|struct;{;int n;;;float m;;} td1;|struct;{;int n;;;float m;;} aa;;stuct aa td1|#define AA struct aa;AA {;int n;;;;float m;;} td1;
- 4
输入一个表示半径的浮点数,计算圆的面积的程序正确的有:[br][/br] (圆周率取使用math库中的pi值,结果保留2位小数) A: import math <br> radius = float(input()) area = math.pi * radius ** 2 print(round(area, 2)) B: import math <br> radius = float(input()) area = pi * radius ** 2 print(round(area, 2)) C: from math import pi <br> radius = float(input()) area = math.pi * radius ** 2 print(round(area, 2)) D: from math import pi <br> radius = float(input()) area = pi * radius ** 2 print(round(area, 2))