1、printf(error! n bu shi ji shu!,n);return;/*n在这里不能是奇数*/ x=(4*m-n)/2;y=(n-2*m)/2;if(x=0)&(y=0) printf(x=%d,y=%dn,x,y);else shu ru cuo wu!getch();math.hstdlib.hfloat a,b,C;enter 3number(a,b,C):%.2f %.2f %.2fa,&b,&C);s=0.5*a*b*sinC;s=%.2fn,s);int ds,nl,yf;char c;shu ru ds;%dds);if (ds1184) input error!p
2、ress any end.n%cc);exit(0);/*输入的数字必须是-141184之间*/ nl=(ds+115)%100;yf=(ds+115)/100;nl=%d,yf=%dn,nl,yf);string.hchar s1100,s2100,s3100,s4100;input a string:gets(s1);strcpy(s1,s2);strcat(s1,-strcpy(s3,strcat(s1,);strcat(strcpy(s3,strcat(s1,),s2);strcpy(s4,strcat(strcpy(s3,strcat(s1,),s2);puts(s4);pasuef
3、loat x1,x2,a,b,c;input 3 number(a,b,c):%f%f%fx1=(-b+sqrt(b*b-4*a*c)/(2*a);x2=(-b-sqrt(b*b-4*a*c)/(2*a);x1=%f,X2=%fn,x1,x2);int a,b,c,t;input 3 number:%d%d%dif(ab) t=a;a=b,b=t;c) a=c;c=t;if(bt=b;b=c;1:%d,2:%d,3:%dn,a,b,c);conio.htextbackground(YELLOW);/* 设置背景色为黄色,注意颜色应该大写,可更改 */ textcolor(RED); /* 设置
4、文件颜色为红色,可更改 */ clrscr(); /* 清屏,使设置生效 */ if(r=0) x1=(-b+sqrt(delt)/(2*a);x2=(-b-sqrt(delt)/(2*a);x1=%.3f x2=%.4fnp=-b/(2*a);q=sqrt(-delt)/(2*a);p=%.4fq=%.4fn,p,q);int k=0;while(kint a,b,c,oper;long limit,i=0;char char1;textcolor(GREEN);/*设置字体颜色为绿色*/ /*清屏,是设置生效*/ while(i=3) qing xuan ze jia huo jian(1
5、or2,1:+,2:-noper);Enter max (10000):%ldlimit);srand(unsigned long)time(0);a=rand()*limit/RAND_MAX;b=rand()*limit/RAND_MAX;while(atm_wday;if(wday1=6)strcpy(s2,Happy saturday!else if(wday1=0)Happy sundayhour1=timeptr-tm_hour;if(hour1=4&hour1=17&=22)Good afternoon!Good evening!%s%s%s,s1,s2,s3);int day,
6、year,month,i=0;textbackground(BROWN);=3)Input 2 number:year,&month);switch(month)case 1:case 3:case 5:case 7:case 8:case 10:case 12: day=31;break;case 4:case 6:case 11:day=30;case 2:day=28;if(year%4=0&year%100!=0)|year%400=0)day=29;deflault:Invalid month input!There are%d days in %d.%dn,day,year,month);
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