자료형 크기 확인하기.. sizeof (ppt. 16)
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#include<stdio .h="">
void main()
{
printf("n char : %d byte", sizeof(char));
printf("n long : %d byte", sizeof(long));
printf("n int : %d byte", sizeof(int));
printf("n short : %d byte", sizeof(short));
printf("n unsigned : %d byte", sizeof(unsigned));
printf("n float : %d byte", sizeof(float));
printf("n double : %d byte", sizeof(double));
}
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실수형의 표현 (ppt. 9)
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#include<stdio .h="">
#define MAXBIT 31
void main()
{
int i, cnt=0;
union _float{
float flt;
long lng;
} temp;
temp.flt = -0.5;
for(i=MAXBIT; i>=0; i--){
(temp.lng>>i)&1 ? putchar('1') : putchar('0');
if(cnt==0 || cnt==8) putchar(' ');
else if(cnt>8 && !(i%8)) putchar(' ');
cnt++;
}
}
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메모리 위치 확인 (ppt. 12)
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#include<stdio .h="">
void main()
{
int in=0x4142;
char ch1, ch2;
ch1 = in;
ch2 = in >> 8;
printf("addr of in : %un", &in);
printf("addr of ch1 : %un", &ch1);
printf("addr of ch2 : %un", &ch2);
// printf("nch1=%c, ch2=%cn", ch1, ch2);
}
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</stdio></stdio></stdio>
