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Raspberry Pi 的代码
9-1.cpp
#include
#define PI 3.1415926
void main()
{float l,s,r,v;
printf("input radius:");
scanf("%f",&r);
l=2.0*PI*r;
s=PI*r*r;
v=4.0/3*PI*r*r*r;
printf
9-2.cpp
#include
#define R 3.0
#define PI 3.1415926
#define L 2*PI*R
#define S PI*R*R
void main()
{
printf("L=%f\nS=%f\n",L,S);
}
9-4.cpp
#include
#define PI 3.1415926
#define CIRCLE(R,L,S,V) L=2*PI*R;S=PI*R*R;V=4.0/3.0*PI*R*R*R
void main()
{float r,l,s,v;
scanf("%f",&r);
CIRCLE(r,l,s,v);
printf(
9-3.cpp
#include
#define PI 3.1415926
#define S(r) PI*r*r
void main()
{float a,area;
a=3.6;
area=S(a);
printf("r=%f\narea=%f\n",a,area);
}
6-6.cpp
#include
#include
void main()
{
int s;
float n,t,pi;
t=1;pi=0;n=1.0;s=1;
while(fabs(t)>1e-6)
{pi=pi+t;
n=n+2;
s=-s;
t=s/n;
}
pi=pi*4;
printf("pi=%10.6f\n",pi);
9-1.cpp
#include
#define PI 3.1415926
void main()
{float l,s,r,v;
printf("input radius:");
scanf("%f",&r);
l=2.0*PI*r;
s=PI*r*r;
v=4.0/3*PI*r*r*r;
printf
9-2.cpp
#include
#define R 3.0
#define PI 3.1415926
#define L 2*PI*R
#define S PI*R*R
void main()
{
printf("L=%f\nS=%f\n",L,S);
}
9-4.cpp
#include
#define PI 3.1415926
#define CIRCLE(R,L,S,V) L=2*PI*R;S=PI*R*R;V=4.0/3.0*PI*R*R*R
void main()
{float r,l,s,v;
scanf("%f",&r);
CIRCLE(r,l,s,v);
printf(
9-3.cpp
#include
#define PI 3.1415926
#define S(r) PI*r*r
void main()
{float a,area;
a=3.6;
area=S(a);
printf("r=%f\narea=%f\n",a,area);
}
6-6.cpp
#include
#include
void main()
{
int s;
float n,t,pi;
t=1;pi=0;n=1.0;s=1;
while(fabs(t)>1e-6)
{pi=pi+t;
n=n+2;
s=-s;
t=s/n;
}
pi=pi*4;
printf("pi=%10.6f\n",pi);