[Not put null] str1 copied to str2: 'hoge`▒ƲT+' (length: 10)
[Put null]     str1 copied to str3: '%s' (length: %ld)\n", str3, strlen(str3));
[strcpy]       str1 copied to str4: 'hoge' (length: 4)
[strncpy]      str1[:3] copied to str5: 'hog▒▒*' (length: 6)
[Pointer]      str6 copied to str7: 'fuga' (length: 4)