Amazon Interview Question
SDE1sCountry: India
Interview Type: In-Person
C Implementation:
void minprintf(char *fmt, ...)
{
va_list ap; /* points to each unnamed arg in turn */
char *p, *sval;
int ival;
double dval;
va_start(ap, fmt); /* make ap point to 1st unnamed arg */
for (p = fmt; *p; p++) {
if (*p != '%') {
putchar(*p);
continue;
}
switch (*++p) {
case 'd':
case 'i':
ival = va_arg(ap, int);
printf("%d", ival);
break;
case 'o':
ival = va_arg(ap, int);
printf("%o", ival);
break;
case 'x':
ival = va_arg(ap, int);
printf("%x", ival);
break;
case 'X':
ival = va_arg(ap, int);
printf("%X", ival);
break;
case 'u':
ival = va_arg(ap, int);
printf("%u", ival);
break;
case 'c':
ival = va_arg(ap, int);
printf("%c", ival);
break;
case 'f':
dval = va_arg(ap, double);
printf("%f", dval);
break;
case 'e':
dval = va_arg(ap, double);
printf("%e", dval);
break;
case 'E':
dval = va_arg(ap, double);
printf("%E", dval);
break;
case 's':
for (sval = va_arg(ap, char *); *sval; sval++)
putchar(*sval);
break;
default:
putchar(*p);
break;
}
}
va_end(ap);
}
In which language are you asking printf method ? like C, C++, Java..?
- Milinkumar February 17, 2015