Submission #462732

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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"
);

int main(void){
	int a,b;
	int res =0;
	
	scanf("%d",&a);
	scanf("%d",&b);
asm(
		"	movq	%%rax,%%rdi\n"
		"	movq	%%rbx,%%rsi\n"
		"	call	test_func\n"
		:"=a"(res)
		:"a"(a),"b"(b)
   );
	printf("%d\n",res);
	
	
	return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:20:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
./Main.c:21:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]

Judge Result