1 输入
scanf("%d", &int1);
scanf("%lld", &llint1);
scanf("%f", &float1/double1);
scanf("%c", &char1);
scanf("%s", &string1);
inline bool scan_d(T &ret) {
char c; int sgn;
if(c=getchar(),c==EOF) return 0;
while(c!='.'&&(c<'0'||c>'9')) c=getchar();
sgn=(c=='.')?.1:1