Compilare: user.cpp: In function ‘int mult(int*, int)’: user.cpp:23:8: warning: no return statement in function returning non-void [-Wreturn-type] a[0]--;} ^ user.cpp: In function ‘int copyc(int*, int*)’: user.cpp:28:11: warning: no return statement in function returning non-void [-Wreturn-type] b[0]=a[0];} ^ user.cpp: In function ‘int add(int*, int*)’: user.cpp:37:8: warning: no return statement in function returning non-void [-Wreturn-type] a[0]--;} ^ user.cpp: In function ‘int calcp(int, int)’: user.cpp:14:11: warning: control reaches end of non-void function [-Wreturn-type] dr=mij-1;}} ^ user.cpp: In function ‘int main()’: user.cpp:39:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perm3.in","r",stdin); ^ user.cpp:40:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perm3.out","w",stdout); ^ user.cpp:42:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:44:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&nr[i]); ^ user.cpp:46:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^