mario，cs50的“格式字符串未使用数据参数”错误

Question

I can't finish my Mario code (making a step) for cs50. Does anyone tell me what needs to be added here?

#include <stdio.h>
#include <cs50.h>

int main(void)
{
    int n;
    do
    {
    n = get_int("Height: ");// height determines how may steps are to be made
    }
    while (n < 1 || n > 8); 
    for (int i = 0; i < n; i++)
    {
      for (int j = 0; j < n; j++)
      {
      printf(" ", n - 1 - i);
      printf("#", i + 1);
      printf("\n");
    }

}

error says this and I can't figure out how to solve this.

marioblock.c:16:19: error: data argument not used by format string [-Werror,-Wformat-extra-args]
      printf(" ", n - 1 - i);
             ~~~  ^
marioblock.c:17:19: error: data argument not used by format string [-Werror,-Wformat-extra-args]
      printf("#", i + 1);
             ~~~  ^
marioblock.c:21:2: error: expected '}'
}
 ^
marioblock.c:5:1: note: to match this '{'
{

Answer 1

The printf function accepts as its first argument a format string. That is, in order to include the subsequent arguments in the output string, you have to specify what types they are and where do you want them to occur, for instance

printf("#%d", 5); // prints "#5"
printf(" %d", 5); // prints " 5"

You use %d for integers, for other data refer to the documentation .