分析：1*1=1;
2*1=2; 2*2=4;
3*1=3; 3*2=6; 3*3=9;
.............
9*1=9; 9*2=18; 9*3=27; 9*4=36; 9*5=45; 9*6=46; 9*7=63; 9*8=72; 9*9=81;
a*b=c
/*
输出结果：
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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
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*/
