0_0_39545167_22725.cpp: In function 'void read(T&)':
0_0_39545167_22725.cpp:11:17: error: there are no arguments to 'isdigit' that depend on a template parameter, so a declaration of 'isdigit' must be available [-fpermissive]
11 | for (; !isdigit(ch); ch = getchar()) if (ch == '-') sgn = -1;
| ^~~~~~~
0_0_39545167_22725.cpp:11:17: note: (if you use '-fpermissive', G++ will accept your code, but allowing the use of an undeclared name is deprecated)
0_0_39545167_22725.cpp:12:21: error: there are no arguments to 'isdigit' that depend on a template parameter, so a declaration of 'isdigit' must be available [-fpermissive]
12 | for (x = 0; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
| ^~~~~~~
0_0_39545167_22725.cpp: In instantiation of 'void read(T&) [with T = int]':
0_0_39545167_22725.cpp:18:6: required from here
0_0_39545167_22725.cpp:11:24: error: 'isdigit' was not declared in this scope
11 | for (; !isdigit(ch); ch = getchar()) if (ch == '-') sgn = -1;
| ~~~~~~~^~~~
0_0_39545167_22725.cpp:12:28: error: 'isdigit' was not declared in this scope
12 | for (x = 0; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
| ~~~~~~~^~~~
|
