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changes.mady.by.user Mikhail Dubrovin

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New Version 26

changes.mady.by.user Mikhail Dubrovin

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Code Block
// *.h :
class A {
public:

  static const int     INT_PAR    = 185;
  static const double  DOUBLE_PAR; 
}

// *.cpp :
const int    A::INT_PAR;
const double A::DOUBLE_PAR = 109.92;

 

Issue OS command from C++

Use method system

Code Block
// int system (const char* command);

#include <stdlib.h>     /* system, NULL, EXIT_FAILURE */
int status = system ("ls -l");

Use method popen

 

Code Block
#include <string>
#include <iostream>
#include <stdio.h>

std::string exec(char* cmd) {
    FILE* pipe = popen(cmd, "r");
    if (!pipe) return "ERROR";
    char buffer[128];
    std::string result = "";
    while(!feof(pipe)) {
    	if(fgets(buffer, 128, pipe) != NULL)
    		result += buffer;
    }
    pclose(pipe);
    return result;
}