#include <stdio.h>
int main()
{
??? int i, j, k;
??? for(i=1; i<5; i++)
??? {
??????? /* 觀察每行的空格數(shù)量，補全循環(huán)條件 */
??????? for(??? j = 1 ;j <= 4?? ;j++??? )?
??????? {
??????????? printf(" ");??? //輸出空格
??????? }
??????? /* 觀察每行*號的數(shù)量，補全循環(huán)條件 */
??????? for( k = 1 ; k <= 7? ; k = k*2-1????? )
??????? {
??????????? printf("*");?? //每行輸出的*號
??????? }
??????? printf("\n");???? //每次循環(huán)換行
??? }
??? return 0;
}