Compilare: user.cpp: In function ‘int main()’: user.cpp:22:37: warning: operation on ‘dr’ may be undefined [-Wsequence-point] sumdr+=v[dr]-v[dr-1]+s[dr++]; ^ user.cpp:22:37: warning: operation on ‘dr’ may be undefined [-Wsequence-point] user.cpp:30:41: warning: operation on ‘dr’ may be undefined [-Wsequence-point] sumdr-=v[dr]-v[dr-1]+s[dr--]; ^ user.cpp:30:41: warning: operation on ‘dr’ may be undefined [-Wsequence-point] user.cpp:38:37: warning: operation on ‘st’ may be undefined [-Wsequence-point] sumst+=v[st+1]-v[st]+s[st--]; ^ user.cpp:38:37: warning: operation on ‘st’ may be undefined [-Wsequence-point] user.cpp:48:41: warning: operation on ‘st’ may be undefined [-Wsequence-point] sumst-=v[st+1]-v[st]+s[st++]; ^ user.cpp:48:41: warning: operation on ‘st’ may be undefined [-Wsequence-point] user.cpp:11:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d", &n, &k, &t); ^ user.cpp:14:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%hd", &s[i]); ^ user.cpp:16:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d", &v[i]); ^