Compilare: user.cpp: In function ‘int main()’: user.cpp:15:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &n, &m); ^ user.cpp:57:19: warning: ‘jj’ may be used uninitialized in this function [-Wmaybe-uninitialized] t2[ji][jj] = 1; ^ user.cpp:57:19: warning: ‘ji’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:38:19: warning: ‘rj’ may be used uninitialized in this function [-Wmaybe-uninitialized] t1[ri][rj] = 1; ^ user.cpp:38:19: warning: ‘ri’ may be used uninitialized in this function [-Wmaybe-uninitialized]