Borderou de evaluare (job #357714)

Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:9:47: error: redeclaration of ‘long long int b’ user.cpp:9:17: error: ‘long long int b’ previously declared here user.cpp:24:13: error: ‘ok’ was not declared in this scope user.cpp:9:21: warning: unused variable ‘cate’ [-Wunused-variable] user.cpp:9:43: warning: unused variable ‘c’ [-Wunused-variable] user.cpp:7:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:10:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:13:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]