Submission #462785

---

Source Code Expand

#include <stdio.h>

asm(
"test_func:\n"
"	pushq	%rbp\n"
"	movq	%rsp, %rbp\n"
"	pushq	%rbx\n"
"	movl	%edi, %eax\n"
"	movl	%esi, %ebx\n"
"	subl	%ebx,%eax\n"
"	popq	%rbx\n"
"	popq	%rbp\n"
"	ret\n"
);

asm(
"	.section	.rodata\n"
".str0:\n"
"	.string	\"hello\\n\"\n"
".str1:\n"
"	.string	\"%d\"\n"
".str2:\n"
"	.string	\"%d\\n\"\n"
);

int main(void){
	int a,b;
	
	scanf("%d",&a);
	scanf("%d",&b);
asm(
		"	subq	$16,%%rsp\n"
		"	movq	%%rdi,8(%%rsp)\n"
		"	movq	%%rsi,0(%%rsp)\n"
		"	movq	%%rax,%%rdi\n"
		"	movq	%%rbx,%%rsi\n"
		"	call	test_func\n"
		
		"	movq	$.str2, %%rdi\n"
		"	movl	%%eax, %%esi\n"
		"	call	printf\n"
		
		"	movq	8(%%rsp),%%rdi\n"
		"	movq	0(%%rsp),%%rsi\n"
		"	addq	$16,%%rsp\n"
		:
		:"a"(a),"b"(b)
   );
	
	
	return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:29:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
./Main.c:30:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]

Judge Result