Argument Vector (argv)

See also

• Processes, Scheduling, Address Spaces

• Commandline Arguments

Argument Vector (int argc, char** argv)

• Passing parameters to programs

• argc: number of arguments

• argv: string array - the “argument vector”

• argv[0]: how the command was invoked (unused, mostly)

code/argv.cpp

#include <print>

int main(int argc, char** argv)
{
    std::println("argc: {}", argc);
    for (int i=0; i<argc; i++)
        std::println("argv[{}]: {}", i, argv[i]);

    return 0;
}

$ ./argv
argc: 1
argv[0]: ./argv

$ ./argv hello sweetheart
argc: 3
argv[0]: ./argv
argv[1]: hello
argv[2]: sweetheart