Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:34:9: error: ‘a’ was not declared in this scope a[i]='a'; ^ user.cpp:35:5: error: ‘a’ was not declared in this scope a[x+1]='\0'; ^ user.cpp:11:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("string.in", "r", stdin); ^ user.cpp:12:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("string.out", "w", stdout); ^ user.cpp:16:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%s",&n,c); ^