Borderou de evaluare (job #406326)

Eroare de compilare: user.cpp: In function ‘Stack* push(Stack*, char)’: user.cpp:54:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.cpp: At global scope: user.cpp:81:11: error: ‘::main’ must return ‘int’ user.cpp: In function ‘int main()’: user.cpp:96:7: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.cpp:90:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:95:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:100:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]