Compilare: user.cpp: In function ‘int maxSum(int (*)[100], int)’: user.cpp:36:26: warning: unused variable ‘result’ [-Wunused-variable] int start = 0, end = 0, result = 0; ^ user.cpp:37:6: warning: variable ‘leftStart’ set but not used [-Wunused-but-set-variable] int leftStart = 0, topStart = 0, rightEnd = 0, bottomEnd = 0; ^ user.cpp:37:21: warning: variable ‘topStart’ set but not used [-Wunused-but-set-variable] int leftStart = 0, topStart = 0, rightEnd = 0, bottomEnd = 0; ^ user.cpp:37:35: warning: variable ‘rightEnd’ set but not used [-Wunused-but-set-variable] int leftStart = 0, topStart = 0, rightEnd = 0, bottomEnd = 0; ^ user.cpp:37:49: warning: variable ‘bottomEnd’ set but not used [-Wunused-but-set-variable] int leftStart = 0, topStart = 0, rightEnd = 0, bottomEnd = 0; ^ user.cpp: In function ‘int main()’: user.cpp:65:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &N); ^ user.cpp:69:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &el); ^