Compilare: user.cpp: In function ‘int main()’: user.cpp:81:16: warning: unused variable ‘j’ [-Wunused-variable] int i, nb, j, lg; ^ user.cpp:81:19: warning: unused variable ‘lg’ [-Wunused-variable] int i, nb, j, lg; ^ user.cpp:82:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &na); ^ user.cpp:85:33: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(S, buffDIM, stdin); ^ user.cpp:91:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &nb); ^ user.cpp:94:33: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(S, buffDIM, stdin); ^