怎么编写键盘程序？

参考下这个

#include "dos.h"

#include "stdio.h"

#define time 10000 /*预定义节拍长度 time（一拍）*/

#define time0 5000 /*预定义半节拍长度 time0*/

#define time1 15000 /*预定义1.5节拍长度 time1*/

#define time2 20000 /*预定义2节拍长度 time2*/

#define time3 30000 /*预定义3节拍长度 time3*/

#define _a 262 /*预定义低音音符1～7*/

#define _b 294

#define _c 330

#define _d 349

#define _e 392

#define _f 440

#define _g 494

#define a 523/*预定义中音音符1～7*/

#define b 587

#define c 659

#define d 698

#define e 784

#define f 880

#define g 988

#define a_ 1047/*预定义手肆高音音符1～7*/

#define b_ 1175

#define c_ 1319

#define d_ 1397

#define e_ 2568

#define f_ 1760

#define g_ 1976

main()

{

int i=0,j

unsigned milliseconds

int music[1000]={

f,time,

f,time,

g,time0,

f,time,

f,time,

g,time0,

f,time,

g,time,

a_,time,

g,time,

f,time,

g,time0,

f,time0,

d,time,

c,time,

a,time,

c,time,

d,time,

c,time,

c,time0,

a,time0,

_g,time,

f,time,

g,time,

a_,time,

g,time,

f,time,

g,time0,

f,time0,

d,time1,

c,time,

a,time,

c,time,

d,time,

c,time,

c,time0,

a,time0,

g,time1,

f,time,

f,time,

g,time1,

f,time,

f,time,

g,time1,

c,time,

d,time,

g,time0,

f,time0,

c,time,

d,time,

g,time0,

f,time0,

d,time0,

d,time,

c,time3

}

while(music[i]!='\0')

{

if(music[i]<=494) /*判断不是低音*/

{

milliseconds=music[i+1]

for(j=1j<8j++)

{

switch(j)

{

case 1: sound(a)

delay(milliseconds)break

case 2: sound(b)

delay(milliseconds)break

case 3: sound(c)

delay(milliseconds)break

case 4: sound(d)

delay(milliseconds)break

case 5: sound(e)

delay(milliseconds)break

case 6: sound(f)delay(milliseconds)break

case 7: sound(g)

delay(milliseconds)break

}

nosound()

}

}

if(music[i]>494&&music[i]<988) /*判断不纯行是做薯哗中音*/

{

milliseconds=music[i+1]

for(j=1j<8j++)

{

switch(j)

{

case 1: sound(_a)

delay(milliseconds)break

case 2: sound(_b)

delay(milliseconds)break

case 3: sound(_c)

delay(milliseconds)break

case 4: sound(_d)

delay(milliseconds)break

case 5: sound(_e)

delay(milliseconds)break

case 6: sound(_f)

delay(milliseconds)break

case 7: sound(_g)

delay(milliseconds)break

}

nosound()

}

}

if(music[i]>988) /*判断不是高音*/

{

milliseconds=music[i+1]

for(j=1j<8j++)

{

switch(j)

{

case 1: sound(a_)

delay(milliseconds)break

case 2: sound(b_)

delay(milliseconds)break

case 3: sound(c_)

delay(milliseconds)break

case 4: sound(d_)

delay(milliseconds)break

case 5: sound(e_)

delay(milliseconds)break

case 6: sound(f_)

delay(milliseconds)break

case 7: sound(g_)

delay(milliseconds)break

}

nosound()[glow=255,red,2]文字[/glow]

}

}

nosound()

i=i+2

}

以下是一个用C语言编写的程序，用于从键盘输入两个正整数，计算它们的和的平方根：凯备清

#include <stdio.h>

#include <math.h>

int main() {

int num1, num2

float sum, sqrt_sum

printf("Enter two positive integers: ")

scanf("%d %d", &num1, &num2)

sum = num1 + num2

sqrt_sum = sqrt(sum)

printf("The square root of the sum of %d and %d is %.2f\n", num1, num2, sqrt_sum)

return 0

}

程序首先使用 printf 函数提示用户输入两个正整数，然后使用 scanf 函数从键盘读取这两个数。

然后，程序计算这两个数的和，并使用 sqrt 函数计算和的平方滚吵根。

最后，程序使用 printf 函数打印出计算结果。

运行程序后，盯前在提示符下输入两个正整数，程序将计算它们的和的平方根，并输出结果。例如：

Enter two positive integers: 3 4

The square root of the sum of 3 and 4 is 2.45

---