C++ 编程(部分答案).doc

谨慎 耐心实验1-1 #include iostream.h void main(void) {cout***************\n; cout Hello! \n; cout***************\n; } 实验1-2 #include iostream.h void main(void) {int a,b,c,sum; coutInput a,b,c:; cinabc; sum=a+b+c; coutSum=sumendl; } 实验1-3 #include iostream.h void main(void) {float a,b,l,s; coutInput a,b:; cinab; l=2*(a+b); s=a*b; coutL=lendl; coutS=sendl; } 实验1-4 #include iostream.h void main(void) {float f,c; cout请输入华氏温度值：; cinf; c=(f-32)*5.0/9.0; cout摄氏温度值为：cendl; } 实验1-5 #include iostream.h void main(void) {int n,a,b,c,d,m; coutInput n:; cinn; a=n/1000; b=(n-a*1000)/100; c=(n-a*1000-b*100)/10; d=n%10; m=d*1000+c*100+b*10+a; coutm=mendl; } 实验2-1 #include iostream.h void main(void) {int a; coutInput a:; cina; if (a0) couta为正数。\n; else couta为负数。\n; if (a%2==0) couta为偶数。\n; else couta为奇数。\n; } 实验2-2 #include iostream.h #include math.h void main(void) {double x,y; coutInput x:; cinx; if (x5) y=-x+3.5; else if (x10) y=20-3.5*(x+3)*(x+3); else y=x/2.0-3.5+sin(x); couty=yendl; } 实验2-3 #include iostream.h void main(void) {int a,c; float r,m,f; cout请输入奖金数额:; cina; if (a=800) c=8; else c=a/100; switch (c) {case 0:r=0;break; case 1:r=0.02;break; case 2: case 3:r=0.04;break; case 4: case 5: case 6: case 7:r=0.08;break; case 8:r=0.1;break; } m=a*r; f=a-m; cout税率：rendl; cout应交税款:mendl; cout实得奖金:fendl; } 练习3-14 #include iostream.h void main(void) {int a,b,c; coutInput a,b,c:; cinabc; if (ab bc) couta\tb\tcendl; else if (ac cb) couta\tc\tbendl; else if (ba ac) coutb\ta\tcendl; else if (bc ca) coutb\tc\taendl; else if (ca ab) coutc\ta\tbendl; else coutc\tb\taendl; } 练习3-16 #include iostream.h void main(void) {float data1,data2,result; char op; cout输入两个实数：; cindata1data2; cout输入运算符：; cinop; switch (op) {case +:result=data1+data2;break; case -:result=data1-data2;break; case *:result=data1*data2;break; case /:result=data1/data2;break; } coutdata1opdata2=resul