简化printf

#if SP
#include <stdio.h>
#include <string.h>
#include <stdarg.h>

void (char *fmt, ...)
{
    va_list ap;
    int ival;
    double dval;
    char *p, *sval;
    va_start(ap, fmt);
    for(p = fmt; *p; ++p)
    {
        if(*p != '%')
        {
            putchar(*p);
            continue;
        }
        switch(*++p)
        {
        case 'd':
            ival = va_arg(ap, int);
            printf("%d",ival);
            break;
        case 'f':
            dval = va_arg(ap, double);
            printf("%f",dval);
            break;
        case 's':
            sval = va_arg(ap, char*);
            while(*sval)
                putchar(*sval++);
            break;
        default:
            putchar(*p);
            break;
        }
    }
    va_end(ap);
}

int main()
{
    int a = 10;
    char* str = "12345";
    printf("%fn",0.5);
    minprintf("%dn%sn",a,str);
    return 0;
}

#endif