实验二 基本数据类型及表达式.doc

一、实验目的1. 熟悉C语言中基本数据类型的概念。2. 掌握各种常量的正确表示方法。3. 掌握变量的定义、赋值和初始化的方法。4. 掌握算术运算符、赋值运算符、增量运算符、逗号运算符的使用方法。5. 掌握数据类型转换的概念。二、实验内容1. 将下列数学表达式写成C表达式，并编写程序验证其正确性。（1）（2）（3）（4）2. 已有如下变量定义，求下列表达式的值。编写程序验证其正确性。（1）double x=1.2,y=8.5;int a=3;x+a%3*(int)(x+y);（2）int a=2,b=3;double x=3.5,y=2.5;(double)(a+b)/2+(int)x%(int)y;（3）int x=4,y=8;(+x)*(-y);（4）int e=1,f=4,g=2;double m=10.5,n=4.0,k;k=(e+f)/g+sqrt(n)*1.2/g+m;（5）double x=2.5,y=4.7;int a=7;x+a%3*(int)(x+y)%2/4;（6）int a,b;int x;x=(a=2,b=5,a+,b+,a+b);1（1）#include#includevoid main()int x=1,y=2;double z;z=(2*x*x+3*y*y)/(x+y);coutz=zendl;（2）#include#includevoid main()int a=1,b=5,c=2;double r,t;r=(-b+sqrt(b*b-4*a*c)/2*a;t=(-b-sqrt(b*b-4*a*c)/2*a;coutr=rtt=tendl;（3）#include#includevoid main()int a,b,c;double z;coutabc;z=1+(1+a/b)/(1-a/c);coutz=zendl;（4）#include#includevoid main() int x=1,y=2,z=3; double r; r=x/(sqrt(fabs(x*x*x+y*y*y+z*z*z); coutrendl;2（1）#include#includevoid main() int a=3; double x=1.2,y=8.5,q; q=x+a%3*(int)(x+y); coutqendl;（2）#include#includevoid main() int a=2,b=3; double x=3.5,y=2.5,r; r=(double)(a+b)/2+(int)x%(int)y; coutr=rendl;（3）#include#includevoid main() int x=4,y=8,t; t=(+x)*(-y); coutt=tendl;（4）（4）#include#includevoid main() int e=1,f=4,g=2; double m=10.5,n=4.0,k; k=(e+f)/g+sqrt(n)*1.2/g+m; coutk=kendl;（5）#include#includevoid main() double x=2.5,y=4.7,e; int a=7; e=x+a%3*(int)(x+y)%2/4; coute=eendl;（6）#include#includevoid main() i