C :

#include<stdio.h>
int main()
{
  int n,m,i,j,q;
  i=1;
  j=1;
  scanf("%d%d",&n,&m);//n 星号数 m行数
  q=m;
  while(q>=1)
  {
	  if(i>=q)
	  {
		  while(j<=n)
		  {
			  printf("*");
			  j++;
		  }
		  j=1;
		  if(m!=1)
		  {
			  printf("\n");
			  m=m-1;
		  }
		  i=0;
		  q=q-1;
	  }
	  else
	  {
		  printf(" ");
	  }
	  i++;
  }
  return 0;
}

C++ :

#include<stdio.h>
int main(){
	int m, n, i, j, o;
	scanf("%d%d",&m, &n);
	for (i=1; i<=n; i++)
	{
		for (o=1; o<=n-i; o++)
		{
			printf(" ");
		}
		for (j=1; j<=m; j++)
		{
			printf("*");
		}
		printf("\n");
	}
	return 0;
}

Pascal :

program hjc;
var
 n,m,j,i,h:integer;
begin
 readln(n,m);
 for i:=m downto 1 do
  begin
   for j:=i-1 downto 1 do
    write(' ');
   for h:=1 to n do
    write('*');
   writeln;
  end;
end.