Compilare: user.cpp: In function ‘int main()’: user.cpp:14:12: warning: unused variable ‘m’ [-Wunused-variable] int n, m, i, j, x, y, s, k, pas; ^ user.cpp:14:21: warning: unused variable ‘x’ [-Wunused-variable] int n, m, i, j, x, y, s, k, pas; ^ user.cpp:14:24: warning: unused variable ‘y’ [-Wunused-variable] int n, m, i, j, x, y, s, k, pas; ^ user.cpp:11:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "covor.in", "r", stdin ); ^ user.cpp:12:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "covor.out", "w", stdout ); ^ user.cpp:17:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d",&n ); ^ user.cpp:19:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%s", S ); ^