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avtobiff tcptomato szatmary curtiszimmerman mahmoudimus xuanhan863 nextgenintelligence freedom000 honeyflyfish foolsh ekapujiw2002 langelee kevinmel2000 eq4 imranm847 shichenhao95 jacobclemente mayhemheroes

gcc ./spectro-photo.c -o spectrophoto


./spectro-photo.c: In function ‘column_to_PCM’:
./spectro-photo.c:12:2: error: ‘for’ loop initial declarations are only allowed in C99 mode
  for (int i = 0; i < column_width; i++) {
  ^
./spectro-photo.c:12:2: note: use option -std=c99 or -std=gnu99 to compile your code
./spectro-photo.c:14:3: error: ‘for’ loop initial declarations are only allowed in C99 mode
   for (int j = 0; j < y; j++) {
   ^
./spectro-photo.c: In function ‘get_pixel_intensity’:
./spectro-photo.c:29:2: error: ‘for’ loop initial declarations are only allowed in C99 mode
  for (int i = 0; i < n; i++) {
  ^
./spectro-photo.c: In function ‘main’:
./spectro-photo.c:61:2: error: ‘for’ loop initial declarations are only allowed in C99 mode
  for (int this_x = 0; this_x < x; this_x++) {
  ^
./spectro-photo.c:63:3: error: ‘for’ loop initial declarations are only allowed in C99 mode
   for (int this_y = 0; this_y < y; this_y++) {


gcc -dumpversion 
4.8

gcc -dumpmachine
x86_64-linux-gnu