问这个程序中的这个离线错误是什么？

EN

#include <stdio.h>
#include <conio.h>

int main()
{
    int a, b, c;
    printf("addition of two numbers\n");
    scanf("%d%d", &a, &b);
    c = a + b;
    printf("%d", c, \n);
    printf("subtraction of two numbers\n");
    scanf("%d%d", &a, &b);
    c = a - b;
    printf("%d", c \n);
    return 0;
}

9    2    C:\Users\Yash\Documents\c.3.cpp    [Error] stray '\' in program
13    2    C:\Users\Yash\Documents\c.3.cpp    [Error] stray '\' in program
C:\Users\Yash\Documents\c.3.cpp    In function 'int main()':
9    17    C:\Users\Yash\Documents\c.3.cpp    [Error] 'n' was not declared in this scope
13    17    C:\Users\Yash\Documents\c.3.cpp    [Error] expected ')' before 'n'