如果针对特定位数的整数的话,可以直接应用除法运算:
int a = 1234, m = 0;
for( int i = 0; i < 4; i++ ){
m += a / Pow(10, 3 - i) * Pow(10, i);
a -= a / Pow(10, 3 - i) * Pow(10, 3 - i);
}
如果输入任意整数的话,我们需要先判断位数:
unsigned int a( unsigned int m){
//判断位数;
int counter = 1;
unsigned int n = m;
while( n >= 10 ){
counter ++;
n = n / 10;
}
unsigned int newNum = 0;
for( int i = 0; i < counter ; i ++ ){
newNum += m / Pow(10, counter - 1 - i) * Pow(10, i);
m -= m / Pow(10, counter - 1 - i) * Pow(10, counter - 1 - i);
}
return newNum;
}