C语言怎么输出第一行一个数，以后每行增加两个数

Question

这样的 A AAA AAAAA AAAAAAA AAAAAAAAA

Answer 1

#include<stdio.h>
#include<stdlib.h>void main()
{
unsigned int lines=0;
printf("输入打印的行数：\n");
scanf("%u",&lines); unsigned int allstar=lines*2-1; //总共的星星数 for (unsigned int l=1;l<=lines;++l)
{
//打印空格数
for(unsigned int b=1;b<allstar-l;++b)
{
printf(" ");
}
//打印星星个数
for(unsigned int s=1;s<=l*2-1;++s)
{
printf("A");
}
printf("\n");
}
system("Pause");
}

Answer 2

#include <stdio.h>void main ()
{
int n,i,j,x;
printf ("Plese input number n:");
scanf ("%d",&n);
for (i=1;i<=n;i++)
{
for (j=0;j<=n-i;j++)
printf(" ");
for (x=1;x<=2*i-1;x++)
printf ("A");
printf ("\n");
}
}

Answer 3

main()
{
int i,j,m,k;
scanf("%d\n",&k);
for(i=1;i<=k;i++)
{
for(j=i;j<k;j++)
printf(" ");
for(m=1;m<=2*k+1;m++)
printf("A"); printf("\n");
}
}