#pragma mark 十进制转二进制
+ (NSString *)convertBinarySystemFromDecimalSystem:(NSString *)decimal
{
NSInteger num = [decimal intValue];
NSInteger remainder = 0; //余数
NSInteger divisor = 0; //除数
NSString * prepare = @"";
while (true){
remainder = num%2;
divisor = num/2;
num = divisor;
prepare = [prepare stringByAppendingFormat:@"%ld",remainder];
if (divisor == 0){
break;
}
}
NSString * result = @"";
for (NSInteger i = prepare.length - 1; i >= 0; i --){
result = [result stringByAppendingFormat:@"%@",
[prepare substringWithRange:NSMakeRange(i , 1)]];
}
return result;
}
#pragma mark 二进制转十进制
+ (NSString *)convertDecimalSystemFromBinarySystem:(NSString *)binary
{
NSInteger ll = 0 ;
NSInteger temp = 0 ;
for (NSInteger i = 0; i < binary.length; i ++){
temp = [[binary substringWithRange:NSMakeRange(i, 1)] intValue];
temp = temp * powf(2, binary.length - i - 1);
ll += temp;
}
NSString * result = [NSString stringWithFormat:@"%ld",ll];
return result;
}
