Compilare: user.cpp: In function ‘int main()’: user.cpp:70:31: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%ld ",b[i][j]); ^ user.cpp:20:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%ld", &n); ^ user.cpp:24:48: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%ld %ld %ld", &x,&y,&r); ^