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96 lines
2.5 KiB
96 lines
2.5 KiB
3 years ago
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#include <stdio.h>
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#include <stdbool.h>
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#include <string.h>
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#include <stdlib.h>
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#define ANSI_COLOR_RED "\x1b[31m"
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#define ANSI_COLOR_YELLOW "\x1b[33m"
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#define ANSI_COLOR_RESET "\x1b[0m"
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#define MAX(a, b) ((a) < (b) ? (b) : (a))
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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void printPaper( unsigned int width, unsigned int height, bool paper[width][height] ){
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for ( unsigned int y = 0; y < height; y++ ){
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printf("Line %i: ", y);
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for ( unsigned int x = 0; x < width; x++ ){
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if ( paper[x][y] == true ) printf("#");
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else printf(".");
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}
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printf("\n");
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}
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}
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void foldPaperX( unsigned int width, unsigned int height, unsigned int col, bool paper[width][height], bool newPaper[col][height]){
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for ( unsigned int x = 1; x < width - col; x++ )
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for ( unsigned int y=0; y < height; y++ )
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newPaper[col - x][y] = paper[col - x][y] || paper[col + x][y];
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}
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void foldPaperY( unsigned int width, unsigned int height, unsigned int row, bool paper[width][height], bool newPaper[width][row]){
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for ( unsigned int y=1; y < height - row; y++ )
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for ( unsigned int x = 0; x < width; x++ )
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newPaper[x][row - y] = ( paper[x][row - y] || paper[x][row + y] );
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}
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unsigned int countDots( unsigned int width, unsigned int height, bool paper[width][height] ){
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unsigned int count=0;
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for ( unsigned int y = 0; y < height; y++ )
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for ( unsigned int x = 0; x < width; x++ )
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if ( paper[x][y] == true ) count++;
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return count;
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}
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int main( int argc, char *argv[] ){
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if( argc == 2 ) {
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FILE *fp=fopen(argv[1], "r");
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unsigned int x=0,y=0,maxx=0,maxy=0;
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while ( fscanf( fp, "%i,%i\n",&x,&y )){
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maxx = MAX(maxx,x);
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maxy = MAX(maxy,y);
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}
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bool paper[maxx+1][maxy+1];
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memset(paper,0,sizeof(bool) * (maxx+1) * (maxy+1) );
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rewind(fp);
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while ( fscanf( fp, "%i,%i\n",&x,&y )){
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paper[x][y] = true;
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}
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printPaper( maxx+1, maxy+1, paper );
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printf("\n");
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char direction = '\0';
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unsigned int position = 0, dots = 0;
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fscanf(fp, "fold along %c=%i\n", &direction, &position);
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if ( direction == 'x' ){
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bool newPaper[position][maxy+1];
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foldPaperX(maxx+1,maxy+1,position, paper, newPaper);
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printPaper( position, maxy+1, newPaper );
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dots=countDots( position, maxy+1, newPaper );
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} else {
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bool newPaper[maxx+1][position];
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foldPaperY(maxx+1,maxy+1,position, paper, newPaper);
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printPaper( maxx+1, position, newPaper );
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dots=countDots( maxx+1, position, newPaper );
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}
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printf("\nThere are %i dots\n", dots);
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fclose(fp);
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return 0;
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} else {
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printf("You need to provide a file\n");
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return 1;
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}
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}
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