Compilare: user.cpp: In function ‘int main()’: user.cpp:49:39: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘char*’ [-Wformat=] fscanf(fin,"%d",&mat[i][j]); ^ user.cpp:45:10: warning: unused variable ‘ch’ [-Wunused-variable] char ch; ^ user.cpp:46:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&m); ^ user.cpp:49:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&mat[i][j]); ^