Basic exercise: The sound of a fish

Writing this question is to give yourself a lesson from codevs1275 FROM2012CCC Canadian High School Information Olympiad

The topic is very simple to judge the monotony of the code as follows

#include <iostream>
using namespace std;

int main () {
    int a,b,c,d;
    cin>>a>>b>>c>>d;
    if (a<b) {
        if (b<c) && (c<d)) cout<< "Fish Rising";
        else cout<< "No Fish";
        return 0;
    }
    if (a==b) {
        if (b==c) && (c==d)) cout<< "Fish at Constant Depth";
        else cout<< "No Fish";
        return 0;
    }
    if (a>b) {
        if (b>c) && (c>d)) cout<< "Fish Diving";
        else cout<< "No Fish";
        return 0;
    }
    return 0;
}

It's the first time you compile it, but because if you have a few conditions behind it, you're going to cry. In a curly brace. The habits of the P-party era still can't be changed.

The second time has not been unexpectedly because of = = = This problem I do not know what to say

Learn from the end of the final refueling good review evening less dry chores early to sleep to improve the efficiency of morning reading

--there is no article to frighten the domestic, the Jianggan horse in the car