how to take input int with % in c?-CodePudding

I have to take two inputs from the user with % input example: 20% 30% I tried this
scanf("%d%d ", &x,&y);

how can I input two values with %? I can only take two integer values.

CodePudding user response：

%% matches literal % character, so this should do it:

int r = scanf("%d%%%d%%", &x,&y); 
if(r != 2) { 
    puts("scanf error");
    exit(1);
}

General note: it's more robust to read entire lines with fgets or POSIX getline, then parse them, for example with sscanf.

Also, please read scanf documentation on what %d and %% do, and what the return value actually means.

CodePudding user response：

Firstly, are you really obligated to also take the %? Couldn't you instead ask the user to input integers?

If you still want to take inputs with %, I think you could treat your inputs as char*, iterate through them until you encounter the '%' char, and then delete it. You could then use the atoi function to transform your char* into integers.