c语言，浮点数转byte array

参考： https://www.cnblogs.com/wdfrog/p/5391613.html

 

 

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#include <stdio.h> #include <string.h> typedef  unsigned char byte; void print_hex(const char *string) {         unsigned char *p = (unsigned char *) string;           for (int i=0; i < strlen(string); ++i) {                 if (! (i % 16) && i)                         printf("\n");                   printf("0x%02x ", p[i]);         }         printf("\n\n"); } void float2Bytes(byte bytes_temp[4],float float_variable){   union {     float a;     byte bytes[4];   } thing;   thing.a = float_variable;   memcpy(bytes_temp, thing.bytes, 4); }   int main() {     //char a[10] ="abcdefghi";   //printf("%p\n", a);   //printf("%p\n", a+1);   //printf("%p\n", a+5);   //printf("0x%02x\n", a);   //print_hex(a);   //printf("%015X\n", 0xa3);   float b = 1234.3;   byte a[4];   float2Bytes(a, b);   printf("%x\n", a[0]);   printf("%x\n", a[1]);   printf("%x\n", a[2]);   printf("%x\n", a[3]);   //printf("a=%x\n", b);   //printf("a=%x\n", a[0]);   //printf("a=%4d\n", b);   //printf("a=%2d\n", b); }