C语言程序设计论文C语言程序设计论文学校：天津电子信息职业技术学院系别：电子技术系专业：通信技术班级：通信S13-26学号：89757姓名：王磊C语言课程设计报告一、设计题目：计算器二、设计目标：进一步加深、巩固学生所学专业课程（《C语言》）的基本理论知识，理论联系实际，进一步培养学生综合分析问题和解决问题的能力。

掌握运用C语言独立地编写、调试应用程序和进行其它相关设计的技能，充分发挥广大同学的潜力，使他们通过本次课程设计而得到全面的锻炼。

三、设计内容：1.设计系统的功能框图、流程图；2.编写计算器的源程序代码；3.上机调试；4.答辩；5.书写实习报告。

四、课程设计所用设备：每人一台计算机。

五、课程设计系统组成及模块功能：（1）主函数模块（2）设置系统进入图形模块（3）初始化图形系统模块（4）计算器计算函数模块（5）窗口函数模块（6）设计鼠标图形函数模块（7）获取特殊键函数模块六、软件环境：Visual c++6.0七、课程设计要求：在计算机上操作，通过Visual c++6.0，设计出“计算器”程序。

八、应提交的材料：实习报告一份，内容包含“计算器”程序代码。

设计报告：程序代码：#include <dos.h>#include <math.h>#include <conio.h>#include <stdio.h>#include <stdlib.h>#include <stdarg.h>#include <graphics.h>#include <string.h>#include <ctype.h>#define UP 0x48#define DOWN 0x50#define LEFT 0x4b#define RIGHT 0x4d#define ENTER 0x0dvoid *rar;struct palettetype palette;int GraphDriver;int GraphMode;int ErrorCode;int MaxColors;int MaxX, MaxY;double AspectRatio;void drawboder(void);void initialize(void);void computer(void);void changetextstyle(int font, int direction, int charsize);void mwindow(char *header);int specialkey(void) ;int arrow();int main(){initialize();computer();closegraph();return(0);}void initialize(void){int xasp, yasp;GraphDriver = DETECT;initgraph( &GraphDriver, &GraphMode, "" ); ErrorCode = graphresult();if( ErrorCode != grOk ){printf("Graphics System Error: %s\n",grapherrormsg( ErrorCode ) );exit( 1 );}getpalette( &palette );MaxColors = getmaxcolor() + 1;MaxX = getmaxx();MaxY = getmaxy();getaspectratio( &xasp, &yasp );AspectRatio = (double)xasp/(double)yasp; }void computer(void){struct viewporttype vp;int color, height, width;int x, y,x0,y0, i, j,v,m,n,act,flag=1;float num1=0,num2=0,result;char cnum[5],str2[20]={""},c,temp[20]={""}; char str1[]="1230.456+-789*/Qc=^%";mwindow( "Calculator" );color = 7;getviewsettings( &vp );width=(vp.right+1)/10;height=(vp.bottom-10)/10 ;x = width /2;y = height/2;setfillstyle(SOLID_FILL, color+3);bar( x+width*2, y, x+7*width, y+height );setcolor( color+3 );rectangle( x+width*2, y, x+7*width, y+height );setcolor(RED);outtextxy(x+3*width,y+height/2,"0.");x =2*width-width/2;y =2*height+height/2;for( j=0 ; j<4 ; ++j ){for( i=0 ; i<5 ; ++i ){setfillstyle(SOLID_FILL, color);setcolor(RED);bar( x, y, x+width, y+height );rectangle( x, y, x+width, y+height );sprintf(str2,"%c",str1[j*5+i]);outtextxy( x+(width/2), y+height/2, str2); x =x+width+ (width / 2) ;}y +=(height/2)*3;x =2*width-width/2;}x0=2*width;y0=3*height;x=x0;y=y0;gotoxy(x,y);arrow();putimage(x,y,rar,XOR_PUT);m=0;n=0;strcpy(str2,"");while((v=specialkey())!=45){while((v=specialkey())!=ENTER){putimage(x,y,rar,XOR_PUT);if(v==RIGHT)if(x>=x0+6*width){x=x0;m=0;}else{x=x+width+width/2;m++;}if(v==LEFT)if(x<=x0){x=x0+6*width;m=4;}else{x=x-width-width/2;m--;}if(v==UP)if(y<=y0){y=y0+4*height+height/2;n=3;}else{y=y-height-height/2;n--;}if(v==DOWN)if(y>=7*height){y=y0;n=0;}else{y=y+height+height/2;n++;}putimage(x,y,rar,XOR_PUT);}c=str1[n*5+m];if(isdigit(c)||c=='.'){if(flag==-1){strcpy(str2,"-");flag=1;}sprintf(temp,"%c",c);strcat(str2,temp);setfillstyle(SOLID_FILL,color+3);bar(2*width+width/2,height/2,15*width/2,3*height/2); outtextxy(5*width,height,str2);}if(c=='+'){num1=atof(str2);strcpy(str2,"");act=1;setfillstyle(SOLID_FILL,color+3);bar(2*width+width/2,height/2,15*width/2,3*height/2);outtextxy(5*width,height,"0.");{if(c=='-'){if(strcmp(str2,"")==0)flag=-1;else{num1=atof(str2);strcpy(str2,"");act=2;setfillstyle(SOLID_FILL,color+3);bar(2*width+width/2,height/2,15*width/2,3*height/2);outtextxy(5*width,height,"0.");}}if(c=='*'){num1=atof(str2);strcpy(str2,"");act=3;setfillstyle(SOLID_FILL,color+3);bar(2*width+width/2,height/2,15*width/2,3*height/2);outtextxy(5*width,height,"0.");}if(c=='/'){num1=atof(str2);strcpy(str2,"");act=4;setfillstyle(SOLID_FILL,color+3);bar(2*width+width/2,height/2,15*width/2,3*height/2); outtextxy(5*width,height,"0.");}if(c=='^'){num1=atof(str2);strcpy(str2,"");act=5;setfillstyle(SOLID_FILL,color+3);bar(2*width+width/2,height/2,15*width/2,3*height/2); outtextxy(5*width,height,"0.");}if(c=='%'){num1=atof(str2);strcpy(str2,"");act=6;setfillstyle(SOLID_FILL,color+3);bar(2*width+width/2,height/2,15*width/2,3*height/2); outtextxy(5*width,height,"0.");}if(c=='='){num2=atof(str2);switch(act){case 1:result=num1+num2;break;case 2:result=num1-num2;break;case 3:result=num1*num2;break;case 4:result=num1/num2;break;case 5:result=pow(num1,num2);break;case 6:result=fmod(num1,num2);break;}setfillstyle(SOLID_FILL,color+3);bar(2*width+width/2,height/2,15*width/2,3*height/2); sprintf(temp,"%f",result);outtextxy(5*width,height,temp);}if(c=='c'){num1=0;num2=0;flag=1;strcpy(str2,"");setfillstyle(SOLID_FILL,color+3);bar(2*width+width/2,height/2,15*width/2,3*height/2); outtextxy(5*width,height,"0.");}if(c=='Q')exit(0);}putimage(x,y,rar,XOR_PUT);return;}void mwindow( char *header ){int height;cleardevice();setcolor( MaxColors - 1 );setviewport( 20, 20, MaxX/2, MaxY/2, 1 );height = textheight( "H" );settextstyle( DEFAULT_FONT, HORIZ_DIR, 1 );settextjustify( CENTER_TEXT, TOP_TEXT );outtextxy( MaxX/4, 2, header );setviewport( 20,20+height+4, MaxX/2+4, MaxY/2+20, 1 ); drawboder();}void drawboder(void){struct viewporttype vp;setcolor( MaxColors - 1 );setlinestyle( SOLID_LINE, 0, NORM_WIDTH );getviewsettings( &vp );rectangle( 0, 0, vp.right-vp.left, vp.bottom-vp.top );}int arrow(){int size;int raw[]={4,4,4,8,6,8,14,16,16,16,8,6,8,4,4,4};setfillstyle(SOLID_FILL,2);fillpoly(8,raw);size=imagesize(4,4,16,16);rar=malloc(size);getimage(4,4,16,16,rar);putimage(4,4,rar,XOR_PUT);return 0;}/int specialkey(void){int key;while(bioskey(1)==0);key=bioskey(0);key=key&0xff? key&0xff:key>>8;return(key);}总结：1）实际操作过程中遇到的问题及解决方法：1.忘记加分号。