gcc 小问题，菜鸟我不会啊

#include<stdio.h>
void main()
{
        double counter;
        double result;
        double temp;
        for(counter=0;counter<2000.0*2000.0*2000.0/20.0+2020;counter+=(5-1)/4){
        temp=counter/1979;
        result=counter;
        }
        printf(Result is %If\\n,result);
}


运行后却是下面的问题：
[linsoiler@localhost l]$ gcc optimize.c -o optimize
optimize.c:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token
optimize.c:11: error: stray ‘\’ in program
optimize.c:11: error: stray ‘\’ in program
怎么解决啊？菜鸟求助啊~~

不好意思啊。。那个出现的问题粘贴错了，我重新发啊。。
出现的问题是：
optimize.c:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token
optimize.c:11: error: stray ‘\’ in program
optimize.c:11: error: stray ‘\’ in program
[linsoiler@localhost l]$ vi optimize.c
[linsoiler@localhost l]$ gcc optimize.c -o optimize
optimize.c: In function ‘main’:
optimize.c:11: error: ‘Result’ undeclared (first use in this function)
optimize.c:11: error: (Each undeclared identifier is reported only once
optimize.c:11: error: for each function it appears in.)
optimize.c:11: error: expected ‘)’ before ‘is’
optimize.c:11: error: stray ‘\’ in program
optimize.c:11: error: stray ‘\’ in program
optimize.c:3: warning: return type of ‘main’ is not ‘int’
不知道该怎么解决呢？

哎，又错了应该是：
[linsoiler@localhost l]$ gcc optimize.c -o optimize
optimize.c: In function ‘main’:
optimize.c:11: error: ‘Result’ undeclared (first use in this function)
optimize.c:11: error: (Each undeclared identifier is reported only once
optimize.c:11: error: for each function it appears in.)
optimize.c:11: error: expected ‘)’ before ‘is’
optimize.c:11: error: stray ‘\’ in program
optimize.c:11: error: stray ‘\’ in program
optimize.c:3: warning: return type of ‘main’ is not ‘int’

你的printf格式错了，括弧里面应该有双引号。

printf(“Result is %If\n”,result);我觉得不是gcc的问题，而是你C语言的问题。

这个....