c - PPM scanning and printing -

i want scan in documents file of type .ppm image files follows following data structure

p3 4 4 255 255 255   0 255 255   0 255 255   0 255 255   0  255 255   0 255   0   0 128 128 128 255 255   0  255 255   0   0 255   0   0   0 255 255 255   0  255 255   0 255 255   0 255 255   0 255 255   0  

every 3 integers mark column after first 3 lines, marks pattern of 4x4 table indicated on second line.

my first step read in file height , width can vary , reprint in exact format using scanf , printf.

my attempt @ follows:

scanf(" %d%d %d", &width, &height, &depth); printf("p3\n%d %d\n %d\n", width, height, depth);     while(scanf("%c", &input) >= 1) {         (int = 0; < width; i++) {             printf("%c %c %c ", input, input, input);             (int j = 0; j < height; j++) {                 printf("\n");             }         }     } 

any idea missing?

there number of errors in code:

1. you scan input once. therefore of pixels have same value. want call scanf in inner loop.
2. the format specifier %c reads in 1 character , not number. should use %d though range of pixel values fits within byte.
3. as mentioned, inner loop prints nothing linefeeds. belongs outer loop.
4. the print should called in inner loop different arguments unless want write black , white images only: printf("%d %d %d ", r, g, b);. again need use %d instead of %c.
5. as mentioned in comment, need skip "p3" in header. modify first line scanf("%*s %d %d %d", &width, &height, &depth);. '%*s' reads string without assigning variable.