Compilare: user.cpp: In function ‘int main()’: user.cpp:141:17: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] write(&A,"a"); ^ user.cpp:142:17: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] write(&B,"b"); ^ user.cpp: In function ‘void read(pair*, FILE*)’: user.cpp:28:32: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(curr -> s, MAX_SIZE, f); ^ user.cpp: In function ‘int main()’: user.cpp:114:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d\n", &N, &M); ^ user.cpp:133:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numar4.out", "w", stdout); ^