Compilare: user.cpp: In function ‘int main()’: user.cpp:9:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ user.cpp:11:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&mat[i][0]); ^ user.cpp:13:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&mat[0][i]); ^ user.cpp:8:30: warning: ‘col’ may be used uninitialized in this function [-Wmaybe-uninitialized] int i,j,n,nr,max,min,lin,col; ^ user.cpp:8:26: warning: ‘lin’ may be used uninitialized in this function [-Wmaybe-uninitialized] int i,j,n,nr,max,min,lin,col; ^