main(){

char a,b,c,d; a='\';

b='\xbc';

c='\0xab';

d='\023';

printf("%c%c%c%c\n",a,b,c,d);

}编译时出现错误，以下叙述中正确的是

main(){

double  d=3.2;    

int  x,y; x=1.2;    

y=(x+3.8)/5.0; 

printf("%d\n",d*y);}程序的输出结果是

int a = 20;

int b = 3;

printf(“%d\n,”a+=(b%=2));

main(){

int a=1,b=2;

a=a+b;

b=a-b;

a=a-b;

printf("%d,%d\n",a,b);}

x=5;

y=x++*x++;

y=--y*--y;

main(){

int x=4,y=7;

x-=y;

y+=x;

printf("%d %d\n",x,y);}