Question

怎样用C++语言编写九九乘法表？

用for循环编写

Answer 1

#include<iostream>
using namespace std;

int main()
{
for(int i = 1; i <= 9; i++)
{
for(int j = 1; j <=i; j++)
cout<<i<<"*"<<j<<"="<<i*j<<", ";
cout<<endl;
}
return 0;
}

1*1=1,
2*1=2, 2*2=4,
3*1=3, 3*2=6, 3*3=9,
4*1=4, 4*2=8, 4*3=12, 4*4=16,
5*1=5, 5*2=10, 5*3=15, 5*4=20, 5*5=25,
6*1=6, 6*2=12, 6*3=18, 6*4=24, 6*5=30, 6*6=36,
7*1=7, 7*2=14, 7*3=21, 7*4=28, 7*5=35, 7*6=42, 7*7=49,
8*1=8, 8*2=16, 8*3=24, 8*4=32, 8*5=40, 8*6=48, 8*7=56, 8*8=64,
9*1=9, 9*2=18, 9*3=27, 9*4=36, 9*5=45, 9*6=54, 9*7=63, 9*8=72, 9*9=81,
Press any key to continue

Answer 2

#include<iostream>
using namespace std;

int main()
{
for(int i=1;i<=9;i++)
{
for(int j=1;j<=i;j++)
{
cout<<i<<" * "<<j<<"="<<i*j<<" ";
}
cout<<endl;
}
return 0;
}

Answer 3

#include <iostream>
using namespace std;
int main()
{
int i,j,result;
for (i=1;i<10;i++)
{
for(j=1;j<=i;j++)
{
result=i*j;
cout<<j<<"*"<<i<<"="<<result<<' ';
}
cout<<endl;
}
return 0;
}