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求大牛帮忙解答？
Write a program which does the following: Given a real decimal number input, take the number apart and convert it to a 32 bit floating point number represented as a binary string (that is, a string of 1s and 0s). You may use both numeric and string manipulations to build the binary number from its parts (sign, mantissa, and exponent), but please return a string. The goal is to explore how an arbitrary decimal number is disassembled and represented as a 32 bit floating point number.
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bobo_包子 2014年01月19日
float f = 0;
cout << "input a number:" << endl;
cin >> f;
unsigned char flag = 1 << 7;
char *pf = (char *)&f;
int i = 0, j = 0;
while(i++ < sizeof(f))
{
while(j++ < 8)
{
if((*pf & flag) == flag)
cout << "1";
else
cout << "0";
flag >>= 1;
}
flag = 1 << 7;
j = 0;
pf += 1;
}
getchar();
getchar();
return 0;