Question

如何写如下要求的代码？ a[a1,a2,a3,a4] b[b1,b2,b3,b4] c[c1,c2,c3,c4] d[d1,d2,d3,d4]

最后输出如下
a1b1c1d1
a1b1c1d2
a1b1c1d3
a1b1c1d4
a1b1c2d1
a1b1c2d2
a1b1c2d3
a1b2c2d4
a1b1c3d1
a1b1c3d2
a1b1c3d3
a1b1c3d4
如此类推

Answer 1

for(int i = 1; i <= 4;i++)
for(int j = 1;j <= 4;j++)

for(int k = 1;k <= 4;k++)

for(int m = 1;m <= 4;m++)

cout<<'a'<<i<<'b'<<j<<'c'<<k<<'d'<<m<<endl;