C programs under Linux, using function EXECLP to run shell commands

Run the shell command through the C program, using the EXECLP function

EXECLP Several parameters are: file name, each parameter, (char*) 0

Where the first parameter in the "Parameters" section is the file name (equivalent to the file name entered two times)

Last parameter Write (char*) 0 Yes

File B.cpp Code:

Loop through the commands → execute the command until you press CTRL + C to end

#include  <stdio.h> #include  <string.h> #include  <unistd.h> #include  < stdlib.h>using namespace std; #define  max_para_nums      10# Define max_char_each_para 1000int split (char* input, char output[max_para_nums][ Max_char_each_para]) {    int counter = 0;    int  Len = strlen (Input);    bool btemp = false;     int i, j = 0;    for (i = 0; i < len;  i++)     {        if (input[i] ==  '   ')         {             if (j != 0 && counter > 0)              {                 output[counter - 1][j] =  ';         '     }            btemp =  false;        }         else        {             if (Btemp == false)              {                j  = 0;                 counter++;                 btemp = true;            }             output[counter - 1][j] = input[i];             j++;        }     }        return counter;} Int main () {    int counter = 0;    char  params[max_para_nums][max_char_each_para];    //using g++ to compile Files &NBSP;&NBSP;&NBSP;&NBSP;//EXECLP ( "g++",  "g++",  "A.cpp",  "-O",  "a",  (char*) 0);         char buf[4096];    pid_t pid;    int status ;     //input prompt string     printf ("console-x\n");     printf ("=========\n");     while  (fgets (Buf, 4096, stdin)  != null)     {         if  (Buf[strlen (buf)  - 1] ==  ' \ n ')          {            buf[ Strlen (buf)  - 1] =  ';        }   '       pid = fork ();         if   (pid < 0)         {             printf ("Fork error");         }        else if  (pid == 0)          {             Counter = split (BUF,&NBsp;params);             if (counter != 0)             {                 printf ("---------\ n");             }             switch (counter)             {                 case 0:  Break;                case  1:                      {                   &nbSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;EXECLP (params[0], params[0],  (char*) 0);                     }                          break;                 case 2:                     {            &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;EXECLP (Params[0], params[0] , params[1],  (char*) 0);                     }                     break;                 case 3:                     {           &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;EXECLP (params[0],  params[0], params[1], params[2],                              (char*) 0 );                     }                     break;                 case 4:                     {               &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;EXECLP (Params[0], params[0], params[1],  params[2],                              params[3],  (char*) 0);                      }                     break;                 case 5:                     {                &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;EXECLP (params[0], params[0], params[1],  params[2],                              params[3], params[4],  (char*) 0);                     }                     break;                 case 6:                     {               &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;EXECLP (Params[0], params[0], params[1],  params[2],                &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;PARAMS[3],&NBSP;PARAMS[4],  params[5],  (char*) 0);                     }                     break;                 case 7:                     {                               EXECLP (params[0], params[0], params[1], params[2],                               params[3], params[4], params[5], params[6],  (char*) 0);                     }                      break;                 case 8:                     {              &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;EXECLP (Params[0],  params[0], params[1], params[2],                              params[3],  params[4], params[5], params[6],                             params[7 ],  (char*) 0);                     }                     break;                 case 9:                     {             &nbSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;EXECLP (Params[0],  params[0], params[1], params[2],                               params[3], params[4], params[5], params[6],                              params[7], params[8],  (char*) 0);                     }                     break;                 case 10:                     {                         &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;EXECLP (params[0], params[0], params[1], params[2],                               params[3], params[4], params[5], params[6 ],                             params[7], params[8], params[9],  ( char*) 0);                     }                     break;                 default:                     {                         printf ("illegal input!\n");                     }                      break;            }         }        else         {            //input Prompt string               //printf ("console-x> ");         }    }    return 0;}

Compile b.cpp into executable file B (input command: g++ b.cpp-o b)

Then open file B and enter the command in turn

Ls-lscat a.cppg++ A.cpp-o a./a

File A.cpp Code:

#include <iostream>using namespace Std;int main () {cout << "Hello world!" << Endl; return 0;}

Examples of running results:

END

C programs under Linux, using function EXECLP to run shell commands