81。includeiostreamusingnamespacestd;intmain(){inta,b,c,r1,r2,r3;cinabc;for(intx2;;x){r1ax;r2bx;r3cx;if(r1r2r1r3){coutx;break;}}return0;} 结果: 82。includeiostreamusingnamespacestd;intmain(){intn,sum0;cinn;for(inti1;in;i){sumi;}coutsum;return0;} 结果: 83。includeiostreamusingnamespacestd;intmain(){intn,a,b;cinabn;for(inti1;in;i){ab;a10;}coutab;return0;} 结果: 84。includeiostreamusingnamespacestd;intmain(){inta,b,power1;cinab;for(inti1;ib;i){powera;power7;}switch(power){case0:coutSunday;break;case1:coutMonday;break;case2:coutTuesday;break;case3:coutWednesday;break;case4:coutThursday;break;case5:coutFriday;break;case6:coutSaturday;break;}return0;} 结果: 85。includeiostreamusingnamespacestd;intmain(){inta,b,power1,i;cinab;for(i1;ib;i){powera;power1000;}if(power10)cout00;elseif(power100)cout0;coutpower;return0;} 结果: