Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:58:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<strlen(s);++i) ^ user.cpp:59:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i<strlen(s)-2) a=a*10+(s[i]-'0'); ^ user.cpp:60:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (i==strlen(s)-1) dir=s[i]; ^ user.cpp:60:38: error: ‘dir’ was not declared in this scope else if (i==strlen(s)-1) dir=s[i]; ^ user.cpp:55:21: warning: unused variable ‘b’ [-Wunused-variable] int a=0,b; ^