题解

a * a+b * b =c * c
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#include <bits/stdc++.h>
using namespace std;
int s(int a,int b);
int f(int c);
void d(int a);
int main(){
    int a,b,c;
    cin >> a >> b;
    c = s(a,b);
    d(c);
	return 0;
}
int s(int a,int b){
    a *= a;
    b *= b;
    a += b;
    return a;
}
int f(int c){
    return sqrt(c);
}
void d(int c){
    printf("%.2f",sqrt(c));
    return;
}