## 2013年9月18日 星期三

### UVA 706 - LCD Display

Algorithm:

Uh...This is really a time consuming problem, haha.
I use an integer array to store all the digits to be displayed.
Then output each of the 5 lines of the digits. (So there's a 2-level for loop.)
Remember to handle blanks correctly.
Also pay attention to run through the integer array. I got an RE because of that. :(

Code:(Ah, so lengthy...)
```#include<cstdio>
#define Z(x) (digit[ t ] == x)

void first(), second(), third(), fourth(), fifth();
int digit[ 8 ] = { 0 }, input, size, n, t, hold;

int main()
{

while( scanf( "%d %d", &size, &input ) && size )
{
n = 7;
hold = input;
while( input != 0 )
{
digit[ n-- ] = input % 10;
input /= 10;
}
for( n = 0; n < 8 && digit[ n ] == 0; n++ ) {}
if( hold == 0 )
n = 7;
first();
for( int i = 0; i < size; i++ )
second();
third();
for( int i = 0; i < size; i++ )
fourth();
fifth();
for( int i = 0; i < 8; i++ )
digit[ i ] = 0;
}
}

void first()
{
t = n;
while( t < 8 )
{
if( !Z(1) && !Z(4) )
{
putchar( ' ' );
for( int i = 0; i < size; i++ )
putchar( '-' );
putchar( ' ' );
}
else
{
for( int i = 0; i <= size+1; i++ )
putchar( ' ' );
}
if( t != 7 )
putchar( ' ' );
t++;
}
puts( "" );
}

void second()
{
t = n;
while( t <= 7 )
{
if( Z(4) || Z(8) || Z(9) || Z(0) )
{
putchar( '|' );
for( int i = 0; i < size; i++ )
putchar( ' ' );
putchar( '|' );
}
else if( Z(5) || Z(6) )
{
putchar( '|' );
for( int i = 0; i <= size; i++ )
putchar( ' ' );
}
else if( Z(1) || Z(2) || Z(3) || Z(7) )
{
for( int i = 0; i <= size; i++ )
putchar( ' ' );
putchar( '|' );
}
else
{
for( int i = 0; i <= size+1; i++ )
putchar( ' ' );
}
if( t != 7 )
putchar( ' ' );
t++;
}
puts( "" );
}

void third()
{
t = n;
while( t <= 7 )
{
if( !Z(1) && !Z(7) && !Z(0) )
{
putchar( ' ' );
for( int i = 0; i < size; i++ )
putchar( '-' );
putchar( ' ' );
}
else
{
for( int i = 0; i <= size+1; i++ )
putchar( ' ' );
}
if( t != 7 )
putchar( ' ' );
t++;
}
puts( "" );
}

void fourth()
{
t = n;
while( t <= 7 )
{
if( Z(6) || Z(8) || Z(0) )
{
putchar( '|' );
for( int i = 0; i < size; i++ )
putchar( ' ' );
putchar( '|' );
}
else if( Z(2) )
{
putchar( '|' );
for( int i = 0; i <= size; i++ )
putchar( ' ' );
}
else if( Z(1) || Z(3) || Z(4) || Z(5) || Z(7) || Z(9) )
{
for( int i = 0; i <= size; i++ )
putchar( ' ' );
putchar( '|' );
}
if( t != 7 )
putchar( ' ' );
t++;
}
puts( "" );
}

void fifth()
{
t = n;
while( t <= 7 )
{
if( !Z(1) && !Z(7) && !Z(4) )
{
putchar( ' ' );
for( int i = 0; i < size; i++ )
putchar( '-' );
putchar( ' ' );
}
else
{
for( int i = 0; i <= size+1; i++ )
putchar( ' ' );
}
if( t != 7 )
putchar( ' ' );
t++;
}
puts( "\n" );
}```