resize.c:118:16: error: expected '}' return 0; } ^ resize.c:11:1: note: to match this '{' {

/** * Copies a BMP piece by piece, just because. */

#include #include

#include "bmp.h"

int main(int argc, char *argv[]) { // ensure proper usage if (argc != 3) { fprintf(stderr, "Usage: ./copy infile outfile "); return 1; }

int factor = atoi(argv[1]); if(factor < 0 || factor > 100) {

// remember filenames char *infile = argv[1]; char *outfile = argv[2];

// open input file FILE *inptr = fopen(infile, "r"); if (inptr == NULL) { fprintf(stderr, "Could not open %s. ", infile); return 2; }

// open output file FILE *outptr = fopen(outfile, "w"); if (outptr == NULL) { fclose(inptr); fprintf(stderr, "Could not create %s. ", outfile); return 3; }

// read infile's BITMAPFILEHEADER BITMAPFILEHEADER bf; fread(&bf, sizeof(BITMAPFILEHEADER), 1, inptr);

// read infile's BITMAPINFOHEADER BITMAPINFOHEADER bi; fread(&bi, sizeof(BITMAPINFOHEADER), 1, inptr);

// ensure infile is (likely) a 24-bit uncompressed BMP 4.0 if (bf.bfType != 0x4d42 || bf.bfOffBits != 54 || bi.biSize != 40 || bi.biBitCount != 24 || bi.biCompression != 0) { fclose(outptr); fclose(inptr); fprintf(stderr, "Unsupported file format. "); return 4; } BITMAPFILEHEADER out_bf; BITMAPINFOHEADER out_bi;

out_bf = bf; out_bi = bi; out_bi.biWidth = bi.biWidth * factor; out_bi.biHeight = bi.biHeight * factor;

int o_padding = (4 - (bi.biWidth * sizeof(RGBTRIPLE)) % 4) % 4; int out_padding = ( 4 - (out_bi.biWidth * sizeof(RGBTRIPLE)) % 4) % 4;

out_bf.bfSize = 54 + out_bi.biWidth * abs(out_bi.biHeight) * 3 + abs(out_bi.biHeight) * out_padding; out_bi.biSizeImage = ((((out_bi.biWidth * out_bi.biBitCount) + 31) & ~31) / 8) * abs(out_bi.biHeight);

// write outfile's BITMAPFILEHEADER fwrite(&bf, sizeof(BITMAPFILEHEADER), 1, outptr);

// write outfile's BITMAPINFOHEADER fwrite(&bi, sizeof(BITMAPINFOHEADER), 1, outptr);

// determine padding for scanlines int padding = (4 - (bi.biWidth * sizeof(RGBTRIPLE)) % 4) % 4;

// iterate over infile's scanlines for (int i = 0, biHeight = abs(bi.biHeight); i < biHeight; i++) { // iterate over pixels in scanline for (int j = 0; j < bi.biWidth; j++) { // temporary storage RGBTRIPLE triple;

// read RGB triple from infile fread(&triple, sizeof(RGBTRIPLE), 1, inptr);

// write RGB triple to outfile fwrite(&triple, sizeof(RGBTRIPLE), 1, outptr); }

// skip over padding, if any fseek(inptr, o_padding, SEEK_CUR);

// then add it back (to demonstrate how) for (int k = 0; k < padding; k++) { fputc(0x00, outptr); } }

// close infile fclose(inptr);

// close outfile fclose(outptr);

// success return 0; }