Dynamic file names when using system(); function

[odavilar]

i'm trying to make an command shell or something like that, so i'm using system("cat archivo.txt"); for example, but what i want is todo something like system("cat"+variable), is there any way to do this?

[horace1]

i'm trying to make an command shell or something like that, so i'm using system("cat archivo.txt"); for example, but what i want is todo something like system("cat"+variable), is there any way to do this?

in C you can put your command in a char array and concatenate the variable on the end, e.g.

    char *c = "*.c";
    char dir[20]="dir ";
    system(strcat(dir, c));                                         /* call system */
 

system() gets the parameter "dir *.c"

in c++ you could use string variables

    string c = "*.c";
    string dir ="dir ";
    system((dir + c).c_str());                                         /* call system */
 

[odavilar]

thanks, that's all i want to know!