Compilare: user.cpp: In function ‘int suma()’: user.cpp:28: warning: no return statement in function returning non-void user.cpp: In function ‘int back(int)’: user.cpp:36: warning: no return statement in function returning non-void user.cpp: In function ‘int main()’: user.cpp:42: warning: format ‘%ld’ expects type ‘long int*’, but argument 2 has type ‘int*’ user.cpp:42: warning: format ‘%ld’ expects type ‘long int*’, but argument 3 has type ‘int*’ user.cpp:42: warning: format ‘%ld’ expects type ‘long int*’, but argument 4 has type ‘int*’ user.cpp:42: warning: format ‘%ld’ expects type ‘long int*’, but argument 5 has type ‘int*’ user.cpp:43: warning: format ‘%ld’ expects type ‘long int*’, but argument 2 has type ‘int*’ user.cpp:43: warning: format ‘%ld’ expects type ‘long int*’, but argument 2 has type ‘int*’ user.cpp:48: warning: format ‘%ld’ expects type ‘long int’, but argument 2 has type ‘int’ user.cpp:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result