VC调用exe文件

第1步： 新建工程，选择Empty Project，Finish

第2步： 新建cpp文件，并输入代码

/* * 使用matlab生成的exe做加减运算（每次调用exe都会启动matlab引擎，比较花时间） */#include <iostream>using namespace std;void main(){    FILE *fp;    int a,b,aaddb,aminusb;    char status[20];    cout<<"输入加数与被加数:"<<endl;    cin>>a>>b;    if ((fp=fopen("MatlabIn.txt","wt+")) == NULL){        cout<<"打开文件MatlabIn.txt失败！"<<endl;        return;    }    fprintf(fp,"a:%d\n",a); // hu 输入参数    fprintf(fp,"b:%d\n",b);    fclose(fp);    if (fp=fopen("MatlabOut.txt","rt")){        fclose(fp);        remove("MatlabOut.txt");    }    system("addandminus.exe");  // hu 启动exe并等待其执行完退出    if ((fp=fopen("MatlabOut.txt","rt")) == NULL){        cout<<"打开文件MatlabOut.txt失败！"<<endl;        return;    }    fscanf(fp,"status:%s\n",status);    if (strcmp(status,"成功")){        fclose(fp);        cout<<status<<endl;        return;    }    fscanf(fp,"a+b:%d\n",&aaddb);  // hu 获得结果    fscanf(fp,"a-b:%d\n",&aminusb);    fclose(fp);    cout<<"aaddb:"<<aaddb<<"\naminusb:"<<aminusb<<endl;    system("pause");}

第3步： 启动matlab2013，新建Function文件，输入代码，并生成exe（Windows Standalone Application）

% %% 对MatlabIn.txt中的参数进行处理并输出到MatlabOut.txt% %function addandminus()MatlabInfid = fopen('MatlabIn.txt','rt');if MatlabInfid<0    MatlabOutfid = fopen('MatlabOut.txt','wt+');    fprintf(MatlabOutfid,'%s\n','status:打开MatlabIn.txt失败');    fprintf(MatlabOutfid,'%s\n','a+b:');    fprintf(MatlabOutfid,'%s\n','a-b:');    fclose(MatlabOutfid);    return;enda  = fscanf(MatlabInfid,'a:%d\n');b  = fscanf(MatlabInfid,'b:%d\n');fclose(MatlabInfid);MatlabOutfid = fopen('MatlabOut.txt','wt+');fprintf(MatlabOutfid,'%s\n','status:成功');fprintf(MatlabOutfid,'a+b:%d\n',a+b);fprintf(MatlabOutfid,'a-b:%d\n',a-b);fclose(MatlabOutfid);end

第4步： 将生成的exe文件复制到上面新建的vc工程目录下，运行vc程序成功！

改进： 上面的方法虽然能运行，但每次调用exe都要启动matlab引擎，比较花时间，可以将第2步和第3步代码加以改进

/* * 使用matlab生成的exe做加减运算（exe一直处于运行状态，直到该程序发出退出命令） */#include <iostream>#include <windows.h>#include <io.h>using namespace std;void main(){    FILE *fp;    int a,b,aaddb,aminusb;    char status[20];    WinExec("addandminus.exe",SW_HIDE);  // hu 启动matlab后直接执行下一步程序    for (int ii=0;ii<5;ii++){        cout<<"输入加数与被加数:"<<endl;        cin>>a>>b;        if ((fp=fopen("MatlabIn.txt","wt+")) == NULL){            cout<<"打开文件MatlabIn.txt失败！"<<endl;            return;        }        fprintf(fp,"a:%d\n",a);  // hu 输入参数        fprintf(fp,"b:%d\n",b);        fclose(fp);        fclose(fopen("MatlabRun.tmp","a"));  // hu 执行matlab        while(!access("MatlabRun.tmp",0));  // hu 该文件不存在说明matlab执行完成        if ((fp=fopen("MatlabOut.txt","rt")) == NULL){            cout<<"打开文件MatlabOut.txt失败！"<<endl;            return;        }        fscanf(fp,"status:%s\n",status);        if (strcmp(status,"成功")){            fclose(fp);            cout<<status<<endl;            return;        }        fscanf(fp,"a+b:%d\n",&aaddb);        fscanf(fp,"a-b:%d\n",&aminusb);        fclose(fp);        cout<<"aaddb:"<<aaddb<<"\naminusb:"<<aminusb<<endl;    }    fclose(fopen("MatlabStop.tmp","a"));  // hu 退出matlab    system("pause");}

% %% 每隔0.1s判断一次指令文件状态% MatlabRun.tmp   对MatlabIn.txt中的参数进行处理并输出到MatlabOut.txt% MatlabStop.tmp 退出程序% %function addandminus()while 1    pause(0.1);    if exist('MatlabRun.tmp','file')   % hu 若该文件存在，执行程序        MatlabInfid = fopen('MatlabIn.txt','rt');        if MatlabInfid<0            MatlabOutfid = fopen('MatlabOut.txt','wt+');            fprintf(MatlabOutfid,'%s\n','status:打开MatlabIn.txt失败');            fprintf(MatlabOutfid,'%s\n','a+b:');            fprintf(MatlabOutfid,'%s\n','a-b:');            fclose(MatlabOutfid);            delete('MatlabRun.tmp');            while exist('MatlabRun.tmp','file')                delete('MatlabRun.tmp');            end            continue;        end        a  = fscanf(MatlabInfid,'a:%d\n');    % hu 获得输入参数        b  = fscanf(MatlabInfid,'b:%d\n');        fclose(MatlabInfid);        MatlabOutfid = fopen('MatlabOut.txt','wt+');        fprintf(MatlabOutfid,'%s\n','status:成功');        fprintf(MatlabOutfid,'a+b:%d\n',a+b);   % hu 输出结果        fprintf(MatlabOutfid,'a-b:%d\n',a-b);        fclose(MatlabOutfid);        delete('MatlabRun.tmp');   % hu 删除该文件表示程序运行完成        while exist('MatlabRun.tmp','file')            delete('MatlabRun.tmp');        end    elseif exist('MatlabStop.tmp','file')  % hu 若该文件存在，退出程序        delete('MatlabStop.tmp');        break;    endendend