Eroare de compilare: user.c: In function ‘insertion_sort’: user.c:5: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:5: note: use option -std=c99 or -std=gnu99 to compile your code user.c: In function ‘main’: user.c:23: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:25: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result