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float和int没办法分开，还是得区分对待
Ubuntu下测试的，windows下没试过，大家试了告诉我啊。#includeunion FLOATUN{ unsigned int unui; float unfl;};int main(){ FLOATUN fun; FLOATUN *pfun; pfun = (FLOATUN *)&fun.unui; printf("usint addr:%p\n",pfun); pfun = (FLOATUN *)&fun.unfl; printf("float addr:%p\n",pfun); bool aa; bool *a = &aa; *a= 1; char bb; char *b = &bb; *b= 0x12; unsigned char cc; unsigned char *c = &cc; *c= 0x12; short dd; short *d = ⅆ *d= 0x123; unsigned short ee; unsigned short *e = ⅇ *e= 0x123; int ff; int *f = &ff; *f= 0x123; unsigned int gg; unsigned int *g = ≫ *g= 0x123; float hh; float *h = &hh; *h= 12.34; double ii; double *i = ⅈ *i= 12.34; unsigned int ui; float uf; // 用联合体获取12.34的32位值 fun.unfl = 12.34; printf("float hex value:%x\n",fun.unui); ui = *a; pfun = (FLOATUN*) &ui; printf("a:%08x\n",*pfun); ui = *b; pfun = (FLOATUN*) &ui; printf("b:%08x\n",*pfun); ui = *c; pfun = (FLOATUN*) &ui; printf("c:%08x\n",*pfun); ui = *d; pfun = (FLOATUN*) &ui; printf("d:%08x\n",*pfun); ui = *e; pfun = (FLOATUN*) &ui; printf("e:%08x\n",*pfun); ui = *f; pfun = (FLOATUN*) &ui; printf("f:%08x\n",*pfun); ui = *g; pfun = (FLOATUN*) &ui; printf("g:%08x\n",*pfun); uf = *h; pfun = (FLOATUN*) &uf; printf("h:%08x\n",*pfun); uf = *i; pfun = (FLOATUN*) &uf; printf("i:%08x\n",*pfun);}
输出
usint addr:0x7fff87c078e0float addr:0x7fff87c078e0float hex value:414570a4a:00000001b:00000012c:00000012d:00000123e:00000123f:00000123g:00000123h:414570a4i:414570a4
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