那里错了? 源代码:

#include<iostream>
#include<cmath>
#include<cstring>
using namespace std;
int64_t a,b,c;
int main(){
    cin>>a>>b>>c;
    int64_t maxx=0;
    if(a>=maxx) maxx=a;
    if(b>=maxx) maxx=b;
    if(c>=maxx) maxx=c;
    cout<<maxx;
    return 0;//a
}

inB2049