Compilare: user.c: In function ‘main’: user.c:107: warning: format ‘%d’ expects type ‘int’, but argument 2 has type ‘long int’ user.c:109: warning: format ‘%d’ expects type ‘int’, but argument 2 has type ‘long int’ user.c:109: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long int’ user.c:66: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:67: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:68: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:76: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result