An Analysis of the error-prone questions of argc,argv and CumberCraft +

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argc is argument count. As the name suggests, is the number of parameters entered by the user on the command line.

argv is argument vector. is the vector library of parameters entered by the user (array)

int main(int argc ,char *argv[])

char *argv[] is a pointer array ([] has higher priority than *, so each element in it is char* type, to understand the difference between char (*argv)[] and char *argv[]), each element, stored are parameters, these parameters are strings. It's actually a vector library. If you don't understand this for a while, don't worry, look down.

It actually records the parameters passed in when the program is executed. Including the statement that opens the program. If I save a program called test.exe, execute it on the command line with a few parameters:

test.exe x y z

In this case, argc is four parameters, namely text.exe, x, y, z. The output would look like this:

Code:

#include

using namespace std;

int main(int argc, char* argv[]) {

cout