Compilare: user.cpp: In function ‘void filla(int, int)’: user.cpp:20:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, t, xx, yy, mi, co; ^ user.cpp: In function ‘int main()’: user.cpp:54:27: warning: unused variable ‘d’ [-Wunused-variable] int n, m, i, j, s, t, d, k, x, y, xx, ma, ok, mi; ^ user.cpp:54:30: warning: unused variable ‘k’ [-Wunused-variable] int n, m, i, j, s, t, d, k, x, y, xx, ma, ok, mi; ^ user.cpp:54:33: warning: unused variable ‘x’ [-Wunused-variable] int n, m, i, j, s, t, d, k, x, y, xx, ma, ok, mi; ^ user.cpp:54:36: warning: unused variable ‘y’ [-Wunused-variable] int n, m, i, j, s, t, d, k, x, y, xx, ma, ok, mi; ^ user.cpp:54:39: warning: unused variable ‘xx’ [-Wunused-variable] int n, m, i, j, s, t, d, k, x, y, xx, ma, ok, mi; ^ user.cpp:54:47: warning: unused variable ‘ok’ [-Wunused-variable] int n, m, i, j, s, t, d, k, x, y, xx, ma, ok, mi; ^ user.cpp:54:51: warning: unused variable ‘mi’ [-Wunused-variable] int n, m, i, j, s, t, d, k, x, y, xx, ma, ok, mi; ^ user.cpp:51:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bila.in","r",stdin); ^ user.cpp:52:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bila.out","w",stdout); ^ user.cpp:56:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:59:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for( j = 1; j <= m; ++j ) scanf("%d",&V[i][j]); ^