一、变量范围
int:,
unsigned int:,
long long:,
unsined long long:,
二、变量转换
char转int:
char a;
int b;
b=a-'0';
int转long long:
int a;
long long b;
b=1ll*a;
long long乘(或除以)常数(如2):
long long a;
a*=2ll;
一、变量范围
int:,
unsigned int:,
long long:,
unsined long long:,
二、变量转换
char转int:
char a;
int b;
b=a-'0';
int转long long:
int a;
long long b;
b=1ll*a;
long long乘(或除以)常数(如2):
long long a;
a*=2ll;