Compilare: user.cpp: In function ‘void solve()’: user.cpp:117:9: warning: unused variable ‘change’ [-Wunused-variable] int change = 0; ^ user.cpp:119:12: warning: unused variable ‘pos’ [-Wunused-variable] int i, pos; ^ user.cpp: In function ‘void readFile()’: user.cpp:184:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &t); ^ user.cpp:190:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^ user.cpp:200:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &nru); ^