Compilare: user.c: In function ‘main’: user.c:24:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("convertor.out", "wt", stdout); ^ user.c: In function ‘solveKeys’: user.c:53:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(str, 1024, pFile); ^ user.c: In function ‘solveValues’: user.c:91:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(str, 1024, pFile); ^ user.c: In function ‘solveKeys’: user.c:66:28: warning: ‘ptr2’ may be used uninitialized in this function [-Wmaybe-uninitialized] nfprint(ptr1 + 1, ptr2 - ptr1 - 1); ^ user.c:66:12: warning: ‘ptr1’ may be used uninitialized in this function [-Wmaybe-uninitialized] nfprint(ptr1 + 1, ptr2 - ptr1 - 1); ^ user.c: In function ‘solveValues’: user.c:121:12: warning: ‘ptr2’ may be used uninitialized in this function [-Wmaybe-uninitialized] nfprint(ptr1, ptr2 - ptr1); ^ user.c:121:12: warning: ‘ptr1’ may be used uninitialized in this function [-Wmaybe-uninitialized]