INT和Float数组在使用循环添加数字后给出错误的结果
对C ++进行一些简单的练习，我卡住了... 当我的总和[t]阵列被声明为整数或浮动时，有时会在最后输出一些疯狂的值，例如4239023或-3.17802e+30（尽管我只添加了范围＆lt; -100; 300＆gt的少量数字;）。当我将其更改为双倍时，它可以正常工作。为什么INT和Float在这里不工作？
#include <iostream>
using namespace std;
int main()
{
int t=0;
int n=0;
int x=0;
cout<<"Amount of sums: ";
cin>>t;
int sum[t];
for (int i=0; i<t; i++)
{
cout<<"Sum no. "<<i+1<<". How many numbers you wish to add: ";
cin>>n;
for (int j=0; j<n; j++)
{
cout<<"Insert number "<<j+1<<" : ";
cin>>x;
sum[i]+=x;
}
}
for (int i=0; i<t; i++)
{
cout<<sum[i]<<endl;
}
return 0;
}
Doing some simple exercies with C++ and I'm stuck...
When my sum[t] array is declared as integer or float it sometimes outputs at the end some crazy values like for example 4239023 or -3.17802e+30 (despite the fact that I add only small numbers from range <-100; 300>). When I change it for double it works correctly. Why int and float don't work here?
#include <iostream>
using namespace std;
int main()
{
int t=0;
int n=0;
int x=0;
cout<<"Amount of sums: ";
cin>>t;
int sum[t];
for (int i=0; i<t; i++)
{
cout<<"Sum no. "<<i+1<<". How many numbers you wish to add: ";
cin>>n;
for (int j=0; j<n; j++)
{
cout<<"Insert number "<<j+1<<" : ";
cin>>x;
sum[i]+=x;
}
}
for (int i=0; i<t; i++)
{
cout<<sum[i]<<endl;
}
return 0;
}
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收到
t的值后，应将其总和数组初始化为零。您可以这样做：You should initialize your array of sums to zeroes after you receive the value of
t. You could do it like this: