Compilare: user.cpp: In function ‘void max_ind(int, int, int)’: user.cpp:11:15: warning: unused variable ‘xx’ [-Wunused-variable] int i, s, xx, yy, mi, ma; ^ user.cpp:11:19: warning: unused variable ‘yy’ [-Wunused-variable] int i, s, xx, yy, mi, ma; ^ user.cpp: In function ‘int main()’: user.cpp:41:18: warning: unused variable ‘s’ [-Wunused-variable] int n, i, j, s, t, d, k; ^ user.cpp:41:21: warning: unused variable ‘t’ [-Wunused-variable] int n, i, j, s, t, d, k; ^ user.cpp:41:24: warning: unused variable ‘d’ [-Wunused-variable] int n, i, j, s, t, d, k; ^ user.cpp:41:27: warning: unused variable ‘k’ [-Wunused-variable] int n, i, j, s, t, d, k; ^ user.cpp:38:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("joctv.in","r",stdin); ^ user.cpp:39:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("joctv.out","w",stdout); ^ user.cpp:43:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:45:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for( j = 1; j <= n; ++j ) scanf("%d",&v[i][j]); ^