Compilare: user.cpp: In function ‘int main()’: user.cpp:11:39: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 3 has type ‘int*’ [-Wformat=] fscanf(f1,"%ld",&mat[i][j]); ^ user.cpp:8:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d%d",&n,&m); ^ user.cpp:11:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%ld",&mat[i][j]); ^