C语言可变参数函数使用总结

//ADS1.2下编译使用

void TestFun(char* fmt,...)

{

int ch;

char selch = 0;

va_list ap = NULL;

va_start(ap, fmt);

do

{

selch = *fmt;

if (selch!='%')

{

putchar(*fmt);

}

else

{

selch = *++fmt;

switch(selch)

{

case 'c':

ch = va_arg(ap, int);

printf("%c",ch);

break;

case 'd':

ch = va_arg(ap,int);

printf("%d",ch);

break;

case 'x':

ch = va_arg(ap, int);

printf("%#x",ch);

break;

}

}

++fmt;

}while(*fmt!='');

va_end(ap);

}

//调用

TestFun((char*)"this is %d,%c,%x",1234,'6',0x12345);

//WIN-TC编译通过

#i nclude

/************************************************************

typedef void *va_list;

#define va_start(ap, parmN) (ap = ...)

#define va_arg(ap, type) (*((type *)(ap))++)

#define va_end(ap)

***************************************************/

void TestFun(cosnt char* fmt,...)

{

int ch;

long i32value = 0;

char selch = 0;

va_list ap = 0;

va_start(ap, fmt);