python - How to embed commandline arguments in a execution command? -


i need pass commandline arguments of c++ code commandline arguments of python script.

my code looks like:

int main(int argc,char * argv[]) { file *in; char buff[512];  cout<<argv[1];  string str = "python comparescript.py "+argv[1]+" "+argv[2]+" "+argv[3];  if(!(in = popen(str, "r"))){     cout<<"image comparison made successful"; } cout<<"image comparison made successful";

it shows eror :

error: invalid operands of types 'const char [25]' , 'char*' binary 'operator+'

how append commandline arguments python execution command?

to able concatenate strings using + operator, @ least 1 of them needs std::string object.

the simplest solution? do

string str = string("python comparescript.py ")+argv[1]+" "+argv[2]+" "+argv[3];

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