happy_3[1]_% gcc -o kadai7-4 kadai7-4.c -lm
happy_3[2]_% kadai7-4
n(10進数) = 100      
2進数では1100100 
happy_3[3]_% kadai7-4
n(10進数) = 200
2進数では11001000 
happy_3[4]_% kadai7-4
n(10進数) = 256
2進数では100000000 
happy_3[5]_%