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#include <stdio.h>
 
int main(void) {
	int a, b;
	scanf("%d", &a);	//input
	scanf("d%", &b);
	printf("%d" %d", a,b);	//output
	return 0;
}
 

prog.c: In function ‘main’:
prog.c:6:10: warning: spurious trailing ‘%’ in format [-Wformat=]
  scanf("d%", &b);
          ^
prog.c:6:8: warning: too many arguments for format [-Wformat-extra-args]
  scanf("d%", &b);
        ^~~~
prog.c:7:16: warning: missing terminating " character
  printf("%d" %d", a,b); //output
                ^
prog.c:7:16: error: missing terminating " character
  printf("%d" %d", a,b); //output
                ^~~~~~~~~~~~~~~~~
prog.c:7:15: error: ‘d’ undeclared (first use in this function)
  printf("%d" %d", a,b); //output
               ^
prog.c:7:15: note: each undeclared identifier is reported only once for each function it appears in
prog.c:8:2: error: expected ‘)’ before ‘return’
  return 0;
  ^~~~~~
prog.c:9:1: error: expected ‘;’ before ‘}’ token
 }
 ^

Standard output is empty