/in/ex1_2.cpp: In function 'int main()':
/in/ex1_2.cpp:9:21: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s", &str);
                 ~~~~^
/in/ex1_2.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%s", &str);
     ~~~~~^~~~~~~~~~~~