用c语言编写一个程序,从键盘上输入两个字符给字符变量a,b,并输出变量a,b的值.

#include
int main()
{
char a,b;
a=getchar();
scanf("%c", &b );
printf("a=%c\n", a );
printf("b=%c\n", b );
return 0;
}
#include
int main()
{
int i;
double d ;
char c;
printf("input char :" );
c=getchar();
putchar(c);
printf("input integer :" );
scanf("%d", &i );
printf("i=%10d\n", i );
printf("input float:" );
scanf("%lf", &d );
printf("d=%.2lf\n", d );
return 0;
}