Compilare: user.cpp: In function ‘int main()’: user.cpp:43:26: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[150]’ [-Wformat=] {fscanf(f,"%s",&s); ^ user.cpp:40:10: warning: unused variable ‘ii’ [-Wunused-variable] {int i,j,ii,jj; ^ user.cpp:40:13: warning: unused variable ‘jj’ [-Wunused-variable] {int i,j,ii,jj; ^ user.cpp:41:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d\n",&n,&m); ^ user.cpp:43:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] {fscanf(f,"%s",&s); ^