turn.c:6: error: variably modified 'cub' at file scope turn.c:6: error: variably modified 'ap' at file scope turn.c: In function 'main': turn.c:15: error: 'for' loop initial declarations are only allowed in C99 mode turn.c:15: note: use option -std=c99 or -std=gnu99 to compile your code turn.c:32: error: redefinition of 'i' turn.c:15: note: previous definition of 'i' was here turn.c:32: error: 'for' loop initial declarations are only allowed in C99 mode turn.c:36: error: redefinition of 'i' turn.c:32: note: previous definition of 'i' was here turn.c:36: error: 'for' loop initial declarations are only allowed in C99 mode turn.c:37: error: 'for' loop initial declarations are only allowed in C99 mode turn.c:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result turn.c:16: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result