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:73:8: 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:108:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(str, 1024, pFile); ^