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3 的代码
3_3.cpp
#include
#include
void main()
{
int i=0,j,k,s,t;
double r,p;
cout
3-3.cpp
#include
void main()
{
int year,mon,days,leap;
coutyear>>mon;
switch(mon)
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
cas
3-3.m
%例程3-3 产生方波波形
t=0:0.1*pi:4*pi;
x=square(t);
y=square(t,30);
subplot(2,1,1);
plot(t,x);
axis([0 5*pi -1.5 1.5]);
subplot(2,1,2);
plot(t,y);
axis([0 5*pi -1.5 1.5]);
3_3.cpp
//3_3.cpp
#include
using namespace std;
int main()
{
double a,b;
double arctan(double x) ;
a=16.0*arctan(1/5.0) ;
b=4.0*arctan(1/239.0) ;
//注意:因为整数相除结果取整,如果参数写1/5,1
3_3.cpp
#include
using namespace std;
double add(double x,double y) //函数的定义,其有返回值
{ double z; z=x+y;
cout
3-3.c
#include
main()
{
int sum=0, i=1;
do
{
sum=sum+i;
i=i+1;
}while(i