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原创问题记录： error while loading shared libraries: libkeyutils.so.1

error while loading shared libraries: libkeyutils.so.1

2022-07-09 23:54:23 301

原创 int与byte互转

int转bytebyte转int

2022-07-09 22:57:12 1553

原创整型与字符串的互相转换

1.将整型转换成字符串：#define my_maxlen 100void int2str(int num, char* str){ int index = 0, len = 0; char buf[my_maxlen] = ""; if (num < 0) { num = -num; str[index++] = '-'; } while ( num > 0 ) { b

2020-12-19 23:58:22 345 2

1.strlenint my_strlen(const char* str){ int idx = 0; while ( str[idx] != '\0' ){ idx++; } return idx;}2.strcmpint my_strcmp(const char* s1, const char* s2){ int idx = 0; while ( *s1 == *s2 && *s1 != '\0'

2020-12-13 16:30:48 86

原创 CRC16校验算法

CRC16校验算法/* Table of CRC values for high-order byte */static const unsigned char table_crc_hi[] = { 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x

2020-12-05 10:25:57 490

原创二进制字符串转十进制数字

unsigned int bin2int (std::string strBin){ unsigned int i = 0; const char *pch = strBin.c_str(); while (*pch == '0' || *pch == '1') { i <<= 1; i |= *pch++ - '0'; } retur...

2018-11-27 17:28:09 7269

翻译两直线四坐标点判断相交并求交点

当判定两条线段相交后，可以进行交点的求解。

2017-11-17 17:39:06 7459 1

原创计算该天是一年中的第几天

int CaculateCurDays(int nYear, int nMonth, int nDay){ int m[12]={31,28,31,30,31,30,31,31,30,31,30,31}; int i, j = 0; for (i=0;i<nMonth-1;i++) { j+=m[i]; } if ( (nYear%400==0 ||(nYear%4=...

2017-08-24 20:25:45 674