Compilare: user.cpp: In function ‘int main()’: user.cpp:50:9: warning: unused variable ‘k’ [-Wunused-variable] int k=0; ^ user.cpp:45:31: 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:48:61: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (in, "%d%d", &matrice [i][0],&matrice [i][1]); ^