函数编程习题参考程序

1sign(x)

(x(x(x输入输出示例（3次）Enterx:10Enterx:-5Enterx:0#include<iostream.h>intsign(floatx);void{floatx;inty;cout<<"Enterx:";}intsign(float{return1;elseif(x==0)returnreturn-}n10。Inputinteger:129718311200Thesumoftheoddnumbersis30#includeintinteven(intn);voidmain(){intx,jsh=0;cout<<"Inputinteger:";{}cout<<"Thesumoftheoddnumbersis}inteven(int{returnreturn}（x2,y2dist(x1,y1,x2,y2)计算两点间的距离。Input(x1,y1): Input(x2,y2):200100#include<stdio.h>#includefloatdist(floatx1,floaty1,floatx2,floaty2);voidmain(){floatx1,y1,x2,y2,distance;}floatdist(floatx1,floaty1,floatx2,float{floatreturndis;}#include<iostream.h>doublefact(intn);voidmain(){intdoubleres=0;}doublefact(int{doublejie=1;inti;return}5excosxe。funcos(e,x)求余弦函数的近似值。cosx

xx2x0 0

x6Inpute:0.0001Inputx:2.1#include<iostream.h>#include<math.h>floatfuncos(floate,floatx);voidmain(){floate,x,res;cout<<"Inpute:";cout<<"Inputx:";}floatfuncos(floate,float{floatt,fuhao,fenzi,fenmu,res=0;inti=1;{}return}62fun(n)n的逆向值。例如，fun(123)321。Inputm1:123Inputm2:-910123#include<iostream.h>intfun(intn);void#include<iostream.h>intfun(intn);void{intm1,m2,r1,r2;cout<<"Inputm1:";cout<<"Inputm2:";}intintfun(int{intres=0,m;{}return}7输入2个正整数m（m>=1,n<=10000输出m~n之间所有的FibonacciFibonacci数列（第一项起1,1,2,3,5,8,13,21，…。要求定义并调用函数fib(n)，它的功能是返回第nFibonacci数。例如，fib(7)13。输入输出示例（括号内为说明文字Inputm:20Input#include<iostream.h>intfib(intn);void{intm,n,i;cout<<"Inputm:";cout<<"Inputn:"; //m#include<iostream.h>intfib(intn);void{intm,n,i;cout<<"Inputm:";cout<<"Inputn:"; //mFib