簡(jiǎn)單計(jì)算器設(shè)計(jì)報(bào)告

簡(jiǎn)單計(jì)算器設(shè)計(jì)報(bào)告045基本功能描述通過(guò)文本編輯框?qū)崿F(xiàn)基本整數(shù)的加減乘除運(yùn)算設(shè)計(jì)思路如下圖是整個(gè)程序進(jìn)行的流程圖，基本方法是在ItemText文本編輯框輸入字符，程序?qū)ψ址M(jìn)行判斷，若輸入不是數(shù)字則提示錯(cuò)誤。輸入正常時(shí)，通過(guò)下拉框ComboBox_InsertString選擇相應(yīng)運(yùn)算符。點(diǎn)擊等號(hào)IDC_OK，即可得出運(yùn)算結(jié)果。操作簡(jiǎn)便，算法簡(jiǎn)單。開始退出新運(yùn)算運(yùn)算彈出對(duì)話框提示錯(cuò)誤整數(shù)？選擇運(yùn)算符輸入字符整數(shù)？輸入字符開始退出新運(yùn)算運(yùn)算彈出對(duì)話框提示錯(cuò)誤整數(shù)？選擇運(yùn)算符輸入字符整數(shù)？輸入字符 否是 否是 是否 軟件設(shè)計(jì)設(shè)計(jì)步驟打開MicrosoftVisualC++6.0,在文件中點(diǎn)擊新建，在彈出框內(nèi)選擇MFCAppWizard[exe]工程，輸入工程名zhoutong及其所在位置，點(diǎn)擊確定將彈出MFCAppWizard-step1對(duì)話框，選擇基本對(duì)話框，點(diǎn)擊完成MFCAppWizard就建立了一個(gè)基于對(duì)話窗口的程序框架界面設(shè)計(jì)對(duì)象ID說(shuō)明文本編輯框IDC_EDIT1輸入數(shù)字下拉框IDC_COMBOOP運(yùn)算符文本編輯框IDC_OK輸入數(shù)字文本編輯框IDC_EDIT3運(yùn)算結(jié)果輸出按鈕IDC_EXIT退出鍵設(shè)計(jì)界面主要程序分析1、字符判定函數(shù)BOOLIsInt(TCHAR*str){inti=atoi(str);TCHARstrtemp[256];wsprintf(strtemp,"%i",i);if(strcmp(str,strtemp)!=0){returnFALSE;}Else{returnTRUE;}}該函數(shù)通過(guò)atoi把文本編輯框讀取的字符轉(zhuǎn)換為數(shù)字，再通過(guò)wsprintf把轉(zhuǎn)換數(shù)字轉(zhuǎn)換為字符，通過(guò)strcmp比較原字符和轉(zhuǎn)換得來(lái)的字符。如相同返回true,不通則返回false.運(yùn)算符選擇程序BOOLMain_OnInitDialog(HWNDhwnd,HWNDhwndFocus,LPARAMlParam){HWNDhwndComboOP=GetDlgItem(hwnd,IDC_COMBOOP);ComboBox_InsertString(hwndComboOP,-1,TEXT("+"));ComboBox_InsertString(hwndComboOP,-1,TEXT("-"));ComboBox_InsertString(hwndComboOP,-1,TEXT("*"));ComboBox_InsertString(hwndComboOP,-1,TEXT("/"));returnTRUE;}通過(guò)ComboBox_InsertString插入要輸入的運(yùn)算符主程序字符獲取TCHARstr1[256];TCHARstr2[256];GetDlgItemText(hwnd,IDC_EDIT1,str1,sizeof(str1));GetDlgItemText(hwnd,IDC_EDIT2,str2,sizeof(str2));調(diào)用子程序判斷輸入是否為數(shù)字if(IsInt(str1)==FALSE){MessageBox(hwnd,TEXT("第一個(gè)數(shù)不是合法整數(shù)"),TEXT("錯(cuò)誤"),MB_OK|MB_ICONERROR);return;}if(IsInt(str2)==FALSE){MessageBox(hwnd,TEXT("第二個(gè)數(shù)不是合法整數(shù)"),TEXT("錯(cuò)誤"),MB_OK|MB_ICONERROR);return;}將輸入字符轉(zhuǎn)換為數(shù)字inti1=atoi(str1);inti2=atoi(str2);inti3=0;獲取運(yùn)算符HWNDhwndComboOp=GetDlgItem(hwnd,IDC_COMBOOP);intcurIndex=ComboBox_GetCurSel(hwndComboOp);運(yùn)算switch(curIndex){case0:{i3=i1+i2;}break;case1:{i3=i1-i2;}break;case2:{i3=i1*i2;}break;case3:{i3=i1/i2;}break;}運(yùn)算結(jié)果轉(zhuǎn)換為字符TCHARstr3[256];itoa(i3,str3,10);輸出運(yùn)算結(jié)果SetDlgItemText(hwnd,IDC_EDIT3,str3);}break;退出程序caseIDC_EXIT:{exit(0); }break;結(jié)果分析該計(jì)算器只能實(shí)