Compilare: user.cpp: In function ‘int main()’: user.cpp:50:16: warning: unused variable ‘x’ [-Wunused-variable] int i, j, k, x, ii, jj; ^ user.cpp:50:19: warning: unused variable ‘ii’ [-Wunused-variable] int i, j, k, x, ii, jj; ^ user.cpp:50:23: warning: unused variable ‘jj’ [-Wunused-variable] int i, j, k, x, ii, jj; ^ user.cpp:51:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^ user.cpp:55:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &ma[i][j]); ^