Compilare: user.cpp: In function ‘int main()’: user.cpp:8:18: warning: unused variable ‘t’ [-Wunused-variable] int n, i, j, t, s, d, k, x, y, ma=0, mi; ^ user.cpp:8:21: warning: unused variable ‘s’ [-Wunused-variable] int n, i, j, t, s, d, k, x, y, ma=0, mi; ^ user.cpp:8:24: warning: variable ‘d’ set but not used [-Wunused-but-set-variable] int n, i, j, t, s, d, k, x, y, ma=0, mi; ^ user.cpp:8:27: warning: unused variable ‘k’ [-Wunused-variable] int n, i, j, t, s, d, k, x, y, ma=0, mi; ^ user.cpp:8:42: warning: variable ‘mi’ set but not used [-Wunused-but-set-variable] int n, i, j, t, s, d, k, x, y, ma=0, mi; ^ user.cpp:11:51: 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",&mat[1][i][j]); ^