Eroare de compilare: user.cpp: In function ‘int getdr()’: user.cpp:75:9: warning: unused variable ‘n’ [-Wunused-variable] int n=0; ^ user.cpp: In function ‘int val()’: user.cpp:97:16: error: ‘semn’ was not declared in this scope return semn*(s[i]+s[i-1]*10-'0'*11); ^ user.cpp:99:16: error: ‘semn’ was not declared in this scope return semn*(s[i-1]-'0'); ^ user.cpp: In function ‘int main()’: user.cpp:107:10: warning: unused variable ‘c’ [-Wunused-variable] char c; ^ user.cpp: In function ‘int val()’: user.cpp:100:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:104:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expresie2.in","r",stdin); ^ user.cpp:105:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expresie2.out","w",stdout); ^ user.cpp:108:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^