07/07/12 18:22:25
>>359
c言語ブランク暦13年の俺様のテクニックをしかと見届けよ
#include<stdio.h>
char b8[9],b16[17];
void d2b8(int n){
for(int i=0;i<8;i++)b8[7-i]=(n&1)+'0',n/=2;b8[8]='\0';
}
void d2b16(int n){
for(int i=0;i<16;i++)b16[15-i]=(n&1)+'0',n/=2;b16[16]='\0';
}
int main(void){
int a,b,i;
while(1){
printf("a=");scanf("%ud",&a);
if(a<0||a>255){printf("8bit\n");continue;}
printf("b=");scanf("%ud",&b);if(b>=a){printf("b<a\n");continue;}
if(b!=1&&b!=2&&b!=4&&b!=8&&b!=16&&b!=32&&b!=64&&b!=128){printf("b=2^n\n");continue;}
d2b8(a);printf("a = %3d (%s)\n",a,b8);
d2b8(b);printf("b = %3d (%s)\n",b,b8);
d2b16(a+b);printf("c = %3d + %3d = %5d (%s)\n",a,b,a+b,b16);
d2b16(a-b);printf("d = %3d - %3d = %5d (%s)\n",a,b,a-b,b16);
d2b16(a*b);printf("e = %3d * %3d = %5d (%s)\n",a,b,a*b,b16);
d2b16(a/b);printf("f = %3d / %3d = %5d (%s)\n",a,b,a/b,b16);
}
//return 0;
}}