Compilare: user.cpp: In function ‘int main()’: user.cpp:89:9: warning: unused variable ‘a’ [-Wunused-variable] int a, b; ^ user.cpp:89:12: warning: unused variable ‘b’ [-Wunused-variable] int a, b; ^ user.cpp:94:9: warning: unused variable ‘currentDist’ [-Wunused-variable] int currentDist = N; ^ user.cpp: In function ‘void citire()’: user.cpp:23:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &N, &M); ^ user.cpp:26:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &A[i]); ^ user.cpp: In function ‘void read()’: user.cpp:81:28: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets (S, sizeof(S), f); ^