C語言函數大全(g開頭)
函數名:gcvt
函數:將浮點數轉換爲字符串
用法:char * gcvt (double value,int ndigit,char * buf);
程序示例:
# include
# include
int main(void)
{
charstr[25];
double num;
int SIG = 5;
num = 9.876;
gcvt(num,sig,str);
printf("string = %s\n",str);
num =-123.4567;
gcvt(num,sig,str);
printf("string = %s\n",str);
num = 0.678 E5;
gcvt(num,sig,str);
printf("string = %s\n",str);
return(0);
}
函數名:geninterrupt
函數:生成軟中斷
用法:void gen interrupt(int intr _ num);
程序示例:
# include
# include
void write char(charch);
int main(void)
{
clrscr();
gotoxy(80,25);
write char(' * ');
getch();
返廻0;
}
void write char(char ch)
{
struct text _ info ti;
gettextinfo(& ti);
_ AH = 9;
_ AL = ch;
_ BH = 0;
_ BL = ti . attribute;
_ CX = 1;
gen interrupt(0x 10);
}
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