这个程序可以实现如下功能：1.需要输入密码才能进入主操作界面，并且只有三次输入密码的机会，如果三次都输错，再按任意键将退出VC环境2.多样形式的矩阵输出3.可以根据要求决定是否清屏每输完一次密码，系统都会有提示，正确时提示你输入正确，前两次输人错误时报警，并提示你查正后再输，第三次输错，报警并提示你，你的三次输入机会已完，按任意键系统将退出！这个程序的最大特点在于输入的密码是隐形的，即密码在屏幕上是以*的形式相识的当密码输入正确后，提示你为矩阵输入九个数字，输完按回车将提示你选择输出形式一共有1~16种不同形式，如果你选择的形式不在1~16范围内，系统报错，提示你重输选择任一输出形式后，按回车，在屏幕上会出现你选择的输出形式，并提示你是否继续，是按y或Y，否按任意键，当执行了否的操作后，系统提示是否清屏，是按y或Y，否按任意键执行了清屏操作后，你将可以为矩阵重新输入新的数值，然后选择相应的输出形式如果你执行了不清屏操作，那么整个关于矩阵的操作结束，程序将进行其他功能的执行，本程序在执行了不清屏操作后，执行输出 ************************************************************的操作，当然如果你希望实现别的功能，可以根据自己的需要自己进行编辑，如果在请屏函数调用完之后，没有别的函数，那么整个程序就执行完了，按任意键可退出VC环境。
include #include #includeclc(){ char k;int g;printf("\t\t清屏请按 Y ");k=getch();if(k=='y'||k=='Y'){system( "cls "); g=1; return (g);}else {g=0;return (g);}}void putstart(){printf("\t\t*************************************************************\n");printf("\t\t*************************************************************\n");printf("\t\t*************************************************************\n");printf("\t\t*********************欢迎进入********************************\n");printf("\t\t*************************************************************\n");printf("\t\t*************************************************************\n");printf("\t\t*************************************************************\n");}void juzhen(){int a[3][3],i,j, x,flag;char hr;printf("\t\t请为矩阵输入数值：");for(i=0;i<=2;i++)for(j=0;j<=2;j++)scanf("%d",&a[i][j]);printf("\t\t*************************************************************\n");flag=1;while(flag){printf("\t\t请选择矩阵输出形式：");scanf("%d",&x);printf("\n\t\t*************************************************************\n");switch(x){case 1: for(i=0;i<=2;i++){for(j=0;j<=2;j++)printf("\t\t%5d",a[i][j]);printf("\n\n\n\n\n\n\n");}; break; case 2:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if((i+j)%2==0)printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");};break; case 3:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if((i+j)%2)printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");};break; case 4:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if(i==j)printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");} ;break; case 5:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if(i+j==2)printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");};break; case 6:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if((i==j)||(i+j==2))printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");};break; case 7:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if(i<=j)printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");}; break; case 8:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if(i>=j)printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");}; break; case 9:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if((j<=1)&(i>=j)&(i+j!=3))printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");};break; case 10:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if((j>=1)&(i<=j)&(i+j!=1))printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");}; break; case 11:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if((i<=1)&(i+j!=3)&(j>=i))printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");}; break; case 12:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if((i>=1)&(i+j!=1)&(i>=j))printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");}; break; case 13:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if(((i==0)||(j==1))&(i!=1))printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");}; break; case 14:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if(((i==2)||(j==1))&(i!=1))printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");}; break; case 15:for(i=0;i<=2;i++){for(j=0;j<=2;j++)if((i==0)||(j==1))printf("\t\t%5d",a[i][j]);else printf(" ");printf("\n\n\n\n\n\n\n");};break; case 16: for(i=0;i<=2;i++){for(j=0;j<=2;j++)if((i==2)||(j==1))printf("\t\t%5d",a[i][j]);else printf(" "); printf("\n\n\n\n\n\n\n");};break; default: system( "cls "); printf("\t\t\a\a\a\a\a\a\a\a\a\a您的输入有误,请査正后再输!\n"); printf("\n\t\t*************************************************************\n");}; printf("\t\t是否继续？是按 y ");hr=getch(); if(hr=='y'||hr=='Y')flag=1;else flag=0; printf("\n\t\t*************************************************************\n");}}#define password "ZaL142857s"pass(){char zal[11];int n; int L;char q;int m=3;printf("\t\t%%%%%%%%%%%%%%%% 磊哥一直在努力做最好的! %%%%%%%%%%%%%%%%%%%\n\n");printf("\n\t\t%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n");printf("\t\t您有3次输入密码的机会\n\n");while(m){ printf("\t\t请输入登陆密码: ");for(L=0;L<10;L++){q=getch();printf("*");zal[L]=q;}zal[L]=0; n=st。
