//Here is the correct code, you have defined the functions declaration at the end of code and function defination at the top which is why it was giving the compliation error

//&&&&&&&&&&&&&&&&&&&&&&& //@@@@@@@@@@@@@@@@@@@@ //************************************* #include using namespace std; #include #include #include #include typedef struct Image { int width; int height; u_char *data; } Image; Image *ImageCreate(int width, int height); Image *ImageRead(char *filename); void ImageWrite(Image *image, char *filename); int ImageWidth(Image *image); int ImageHeight(Image *image); void ImageClear(Image *image, u_char red, u_char green, u_char blue); void ImageSetPixel(Image *image, int x, int y, int chan, u_char val); u_char ImageGetPixel(Image *image, int x, int y, int chan);

/************************ private functions ****************************/ /* die gracelessly */ static void die(char *message) { fprintf(stderr, "ppm: %s ", message); exit(1); } /* check a dimension (width or height) from the image file for reasonability */ static void checkDimension(int dim) { if (dim < 1 || dim > 4000) die("file contained unreasonable width or height"); } /* read a header: verify format and get width and height */ static void readPPMHeader(FILE *fp, int *width, int *height) { char ch; int maxval; if (fscanf(fp, "P%c ", &ch) != 1 || ch != '6') die("file is not in ppm raw format; cannot read"); /* skip comments */ ch = getc(fp); while (ch == '#') { do { ch = getc(fp); } while (ch != ' '); /* read to the end of the line */ ch = getc(fp); /* thanks, Elliot */ } if (!isdigit(ch)) die("cannot read header information from ppm file"); ungetc(ch, fp); /* put that digit back */ /* read the width, height, and maximum value for a pixel */ fscanf(fp, "%d%d%d ", width, height, &maxval); if (maxval != 255) die("image is not true-color (24 bit); read failed"); checkDimension(*width); checkDimension(*height); } /************************ exported functions ****************************/

Image * ImageRead(char *filename) { int width, height, num, size; u_char *p; Image *image = (Image *) malloc(sizeof(Image)); FILE *fp = fopen(filename, "r"); if (!image) die("cannot allocate memory for new image"); if (!fp) die("cannot open file for reading"); readPPMHeader(fp, &width, &height); size = width * height * 3; image->data = (u_char *) malloc(size); image->width = width; image->height = height; if (!image->data) die("cannot allocate memory for new image"); num = fread((void *) image->data, 1, (size_t) size, fp); if (num != size) die("cannot read image data from file"); fclose(fp); return image; } Image* Create(int width, int height) { Image *image = (Image *) malloc(sizeof(Image)); if (!image) die("cannot allocate memory for new image"); image->width = width; image->height = height; image->data = (u_char *) malloc(width * height * 3); if (!image->data) die("cannot allocate memory for new image"); return image; } void ImageWrite(Image *image, char *filename) { int num; int size = image->width * image->height * 3; FILE *fp = fopen(filename, "w"); if (!fp) die("cannot open file for writing"); fprintf(fp, "P6 %d %d %d ", image->width, image->height, 255); num = fwrite((void *) image->data, 1, (size_t) size, fp); if (num != size) die("cannot write image data to file"); fclose(fp); } int ImageWidth(Image *image) { return image->width; } int ImageHeight(Image *image) { return image->height; } void ImageClear(Image *image, u_char red, u_char green, u_char blue) { int i; int pix = image->width * image->height; u_char *data = image->data; for (i = 0; i < pix; i++) { *data++ = red; *data++ = green; *data++ = blue; } } void ImageSetPixel(Image *image, int x, int y, int chan, u_char val) { int offset = (y * image->width + x) * 3 + chan; image->data[offset] = val; } u_char ImageGetPixel(Image *image, int x, int y, int chan) { int offset = (y * image->width + x) * 3 + chan; return image->data[offset]; }

main() { int i, xoff; Image *image1, *image2; image1 = ImageCreate(200,100); ImageClear(image1, 210,180,40); /* mustard color */ ImageWrite(image1, "try1.ppm"); printf("created try1.ppm "); image2 = ImageRead("try1.ppm"); /* put a blue-ish stripe in image */ for (i = 0; i < 100; i++) { for (xoff = 45; xoff < 55; xoff++) { ImageSetPixel(image2, i+xoff, i, 0, 20); /* red channel */ ImageSetPixel(image2, i+xoff, i, 1, 40); /* green */ ImageSetPixel(image2, i+xoff, i, 2, 250); /* blue */ } } ImageWrite(image2, "try2.ppm"); printf("created try2.ppm "); }

################ someone said that this code is corrected but still getting erros

12 u char not name type

23 uchar has not ben declared

23 same

26 same

46 sting to constant

59 same

71 same

78 same

93 uchar

more string to constant/ running code block