cs50x突然报错，不知是什么原因

学CS50x时遇到

#include
#include

int main(void)
{
int numbers[] = {4 ,6 ,8 ,2 ,7 ,5 ,0};

for(int i = 0; i < 7; i++)
{
    if(numbers[i] == 0)
    {
        printf("Found\n");
        return 0;
    }
}
printf("Not found\n");
return 1;

}

/usr/bin/ld: /lib/x86_64-linux-gnu/Scrt1.o: in function _start': (.text+0x1b): undefined reference to main'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [: numbers] Error 1

完全不懂

恢复原来

int main()
{

return 0
}
........
把return 1改成0就好。

clang: error: linker command failed with exit code 1 (use -v to see invocation)

这里已经提示了，main 的返回值不能为1，会报错