Compilare: user.cpp: In function ‘int main()’: user.cpp:90:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&T); ^ user.cpp:93:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d",&N,&M,&K); ^ user.cpp:96:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&v[i][j]); ^ user.cpp: In function ‘void Build_Suff()’: user.cpp:58:60: warning: ‘x4’ may be used uninitialized in this function [-Wmaybe-uninitialized] suff[idx(i,j)] = {x1, x2, x3, x4, idx(i,j)}; ^ user.cpp:58:60: warning: ‘x3’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:58:60: warning: ‘x2’ may be used uninitialized in this function [-Wmaybe-uninitialized]