#include <iostream>
#include <regex>

using namespace std;

int main() 
{
    string s = "/fs/Release/daily_builds/linux64_VCS2021.09/20220704/vcs/bin/vlogan -full64  -Xrtlf -skip_translate_body +define+SYNTHESIS -timescale=1ns/1ns -Xthong=0x1 -diamond_operator -error=noMPD +incdir+.+/remote/dgplt03/image/DGPLT/T-2022.03-SP-DEV/D20220709_7739213/Testing/dw/syn_ver+/remote/dgplt03/image/DGPLT/T-2022.03-SP-DEV/D20220709_7739213/Testing/dw/sim_ver+/remote/dgplt03/image/DGPLT/T-2022.03-SP-DEV/D20220709_7739213/Testing/libraries/syn+./rtl -sverilog +systemverilogext+.v -assert svaext  +v2k -v2005 +define+DC+PRESTO+SYNTHESIS+SYSTEMVERILOG+VERILOG_2000+VERILOG_2001+VERILOG_2005 ./rtl/block.v ./rtl/sadclsgq4l1p4096x40m16b1w0c1p1d0l3s2sdz1rw00_bus_wrapper.v ./rtl/divider.v -work my hello";
    string s1 = "/fs/Release/daily_builds/linux64_VCS2021.09/20220704/vcs/bin/vlogan -full64  -Xrtlf -skip_translate_body +define+SYNTHESIS -timescale=1ns/1ns -Xthong=0x1 -diamond_operator -error=noMPD +incdir+.+/remote/dgplt03/image/DGPLT/T-2022.03-SP-DEV/D20220709_7739213/Testing/dw/syn_ver+/remote/dgplt03/image/DGPLT/T-2022.03-SP-DEV/D20220709_7739213/Testing/dw/sim_ver+/remote/dgplt03/image/DGPLT/T-2022.03-SP-DEV/D20220709_7739213/Testing/libraries/syn+./rtl -sverilog +systemverilogext+.v -assert svaext  +v2k -v2005 +define+DC+PRESTO+SYNTHESIS+SYSTEMVERILOG+VERILOG_2000+VERILOG_2001+VERILOG_2005 ./rtl/block.v ./rtl/sadclsgq4l1p4096x40m16b1w0c1p1d0l3s2sdz1rw00_bus_wrapper.v ./rtl/divider.v";
    std::smatch analyze;
    regex re("(^\\s*\\S*(vhdlan|vlogan) .*) -work\\s+(\\S*) (.*)");
    //if (regex_search (s1, re))
    if(std::regex_search (s,analyze,re)) {
      cout <<"matched " <<  analyze[1] << endl;
      cout <<"matched " <<  analyze[2] << endl;
      cout <<"matched " <<  analyze[3] << endl;
      cout <<"matched " <<  analyze[4] << endl;
    } else { 
      cout <<"not matched" <<endl;
    }
    
    return 0;
}

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}