#include <stdlib.h>
#include <stdio.h>
main()
{

int flag = 0;

FILE* source=fopen ("copie.pgm","r");
FILE* dest=fopen ("negatif.pgm","w");

while (!(feof(source)))
{
char c = fgetc(source);
fputc (c,dest);
	while (flag < 4) {
		 c = fgetc(source);
		 fputc (c,dest);
		if (c == '#') {
			while (c != '\n') {
				c = fgetc(source);
				fputc (c,dest);
			}
			flag--;
		}
		if (c == '\n')  {
			flag++;
		}

	}
	char f = 255 - c;
	fput


}

fclose(source);
fclose(dest);

}