Compilare: user.cpp: In function ‘int main()’: user.cpp:7: warning: conversion lacks type at end of format user.cpp:7: warning: format ‘%d’ expects type ‘int*’, but argument 4 has type ‘long int*’ user.cpp:7: warning: too many arguments for format user.cpp:7: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result