【C语言小练习】 第一行是A，第二行是BBB，第三行是CCCCC 公式是：2N-1

#include <stdio.h>
#include <conio.h>

int main( void )
{
unsigned int lineLength = 4;
unsigned int i = 0;
unsigned int j = 0;
bool inputState = false;
int ch = 0;
unsigned int lineMaxLength = 0;
unsigned int spaceLength = 0;
unsigned int charLength = 0;
//1.处理输入
do
{
printf( "请输入行数：" );
scanf( "%u", &lineLength );
if( lineLength > 26 )
{
printf( "错误！行数最多为26行，请重新输入。/r/n/r/n" );
inputState = false;
}
else
{
inputState = true;
}
} while ( !inputState );
//2.输出
lineMaxLength = 2 * lineLength - 1;
for( i = 1, ch = 'A', charLength = 1; i <= lineLength; i++, ch++, charLength += 2 )
{
spaceLength = (lineMaxLength - charLength) / 2;
//2.1 输出左边空格
for( j = 1; j <= spaceLength; j++ )
{
printf( " " );
}
//2.2 输出中间字符
for( j = 1; j <= charLength; j++ )
{
printf( "%c", ch );
}
printf( "/r/n" );
}
//End
printf( "/r/n运行结束。按任意键退出。/r/n" );
getch();
return 0;
}