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

}

程序如下：

#include <stdio.h>

int main()

{

char ch

scanf("敬悄%c",&ch)

printf("%c",ch-'a'+'A')

return(0)

}

示例一：

#include<stdio.h>

int main()

{

char ch

scanf("%c",&ch)

printf("Letter %c converted into a letter %c!",ch,ch-32)；//大写字母ASCII码比小写字母小32

return 0

}

示例二：

ch=getchar()

if(ch>='a'&&ch<='z')

{ch=ch-32

prinft("大写字母是：%c\n",ch)

}

else(printf("请输入大写字母")

)

示例三：

#include <stdio.h>并稿者

main()

{

char c                         //声明变量

scanf("%c",&c)                //键盘上取值

printf("%c %c",c,ch-'a'+'A'绝薯)//本身和大写输出

}

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