教育理论c语言

求三个数的最大值！！

#include <stdio.h>

int main()

{

int a,b,c,max;

printf("请输入三个数，用逗号隔开\n"); scanf("%d,%d,%d",&a,&b,&c); max=a;

if (max<b)

max=b;

if (max<c)

max=c;

printf("最大值是%d\n",max); return 0;

}

5的阶乘

#include<stdio.h>

int main()

{

int a,b;

a=1;

b=2;

while(b<=5)

{

a=a*b;

b=b+1;

}

printf("结果是%d\n",a);

return 0;

}

三角形面积

#include<stdio.h>

#include<math.h>

int main()

{

double a,b,c,s,area;

a=3.67;

b=5.43;

c=6.21;

s=(a+b+c)/2;

area=sqrt(s*(s-a)*(s-b)*(s-c));

printf("a=%f\tb=%f\tc=%f\n",a,b,c); printf("area=%f\n",area);

return 0;

}

解方程

#include<stdio.h>

#include<math.h>

int main()

{

double a,b,c,disc,x1,x2,p,q;

scanf("%lf%lf%lf",&a,&b,&c);

disc=b*b-4*a*c;

p=-b/(2.0*a);

q=sqrt(disc)/(2.0*a);

x1=p+q;

x2=p-q;

printf("x1=%7.2f\nx2=%7.2f\n",x1,x2); return 0;

}

求方程的根！！！！

#include<stdio.h>

#include<math.h>

int main()

{

double a,b,c,disc,x1,x2;

scanf("%lf%lf%lf", &a,&b,&c);

disc=b*b-4*a*c;

if (disc<0)

printf("方程无解\n");

else

{

x1=(-b+sqrt(disc))/2*a;

x2=(-b-sqrt(disc))/2*a;

printf("方程的根是%7.2f%7.2f\n",x1,x2); }

return 0;

}

从小到大排列三个数

#include<stdio.h>

#include<math.h>

int main()

{

float a,b,c,t;

printf("请输入三个数\n"); scanf("%f%f%f",&a,&b,&c); if (a>b)

{

t=a;

a=b;

b=t;

}

if(a>c)

{

t=a;

a=c;

c=t;

}

if(b>c)

{

t=b;

b=c;

c=t;

}

printf("从小到大排列为\n%5.2f return 0;

}

闰年判断

#include<stdio.h>

int main()

{

int year,leap;

printf("enter year:"); scanf("%d",&year); if(year%4==0)

{

if(year%100==0) {

if(year%400==0) leap=1; else

leap=0; %5.2f\n",a,b,c); %5.2f

}

else

leap=1;

}

else

leap=0;

if(leap)

printf("%d is",year);

else

printf("%d is not",year);

printf(" a leap year.\n");

return 0;

}

二方法！！

#include<stdio.h>

int main()

{

int year,leap;

printf("enter year:");

scanf("%d",&year);

if((year%4==0&&year%100!=0)||(year%400==0)) printf("这一年是闰年\n");

else

printf("这一年是平年\n");

return 0;

}

输入三个数输出最大值！

#include<stdio.h>

int main()

{

int a,b,c,d,max;

printf("请输入三个数字a,b,c\n");

scanf("%d %d %d",&a,&b,&c);

d=(a>b) ? a:b;

max=(d>c) ? d:c;

printf("max=%d\n",max);

return 0;

}

二方法

#include<stdio.h>

int main()

{

int a,b,c;

scanf("%d %d %d",&a,&b,&c);

if(a<b)

if(b<c)

printf("max=%d\n",c);

else

printf("max=%d\n",b);

else

if(a>c)

printf("max=%d\n",a);

return 0;

}

Gtk编译网格

#include <stdio.h>

#include<gtk/gtk.h>

int main(int argc, char *argv[])

{

gtk_init(NULL,NULL);

GtkWidget*window=gtk_window_new(GTK_WINDOW_TOPLEVEL); g_signal_connect(window,"destroy",gtk_main_quit,NULL);

/*GtkBox*box1=gtk_box_new(GTK_ORIENTATION_VERTICAL,0); /*GtkBox*box1=gtk_box_new(GTK_ORIENTATION_HORIZONTAL,0); GtkButton*but=gtk_button_new();

gtk_button_set_label(but,"小清新");

gtk_box_pack_start(box1,but,FALSE,FALSE,0);

gtk_widget_show(but);

GtkButton*but1=gtk_button_new();

gtk_button_set_label(but1,"小屌丝");

gtk_box_pack_start(box1,but1,FALSE,FALSE,0);

gtk_widget_show(but1);

GtkEntry*entry1=gtk_entry_new();

gtk_box_pack_start(box1,entry1,FALSE,FALSE,0);

gtk_widget_show(entry1);

gtk_container_add(window,box1);

gtk_widget_show(box1);

GtkGrid*grid1=gtk_grid_new();

GtkButton*but1=gtk_button_new();

gtk_button_set_label(but1,"账号");

gtk_grid_attach(grid1,but1,0,0,1,1);

gtk_widget_show(but1);

//GtkGrid*grid2=gtk_grid_new();

GtkButton*but2=gtk_button_new();