输入2个正整数m和n，求其最大公约数和最小公倍数
#include
#include
int main()
int m,n,p,q,s,r;
printf("请输入两个正整数；m,n\n");
scanf("%d,%d",&m,&n);
#include<stdio.h>
main()
int a,b,t=0;
scanf("%d %d",&a,&b);
if (a<b)
printf("%d %d %d %d %d",(a+b),(a-b),(a/b),(a*b),(a%b));
}
主要特点
C语言是一种结构化语言，它有着清晰的层次，可按照模块的方式对程序进行编写，十分有利于程序的调试，且c语言的处理和表现能力都非常的强大，依靠非常全面的运算符和多样的数据类型，可以轻易完成各种数据结构的构建，通过指针类型更可对内存直接寻址以及对硬件进行直接操作，因此既能够用于开发系统程序，也可用于开发应用软件。
以上内容参考：百度百科-c语言
小游戏2048源码：
#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<time.h>
#include<windows.h>
int jsk( ); //计算空格数
void rsgm( ); //重置游戏
void inkey( ); //按键输入
void left( ); //向左移动
void right( ); //向右移动
void up( ); //向上移动
void down( ); //向下移动
void show( ); //输出界面
void adnum( ); //添加随机数
void yes( ); //游戏是否结束(1是0否)
void gtxy(int x, int y); //控制光标位置的函数
int a[4][4]; //存储16个格子中的数字
int score = 0; //每局得分
int best = 0; //最高得分
int ifnum; //是否需要添加数字(1是0否)
int over; //游戏结束标志(1是0否)
int i,j,k;
int main( )
{ rsgm( ); //重置游戏
inkey( ); //按键输入
return 0;
}
void setColor(unsigned short ForeColor = 7, unsigned short BackGroundColor = 0)
{ HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);
SetConsoleTextAttribute(handle, ForeColor + BackGroundColor * 0x10);
} //用于控制字符颜色的函数
void rsgm( ) //重置游戏
{ score = 0; ifnum = 1; over = 0; srand((unsigned)time(0)); //启动随机数发生器
int n = rand( ) % 16; //随机函数产生0-15的数字
for (i = 0; i < 4; i++)
{for (j = 0; j < 4; j++)
{ if (n == 0) { int k = rand( ) % 3; if (k == 0 || k == 1) { a[i][j] = 2; }
else { a[i][j] = 4; } n--; }
else { a[i][j] = 0; n--; }
}
}
adnum( );
system("cls");
CONSOLE_CURSOR_INFO cursor_info={1,0}; //以下两行是隐藏光标的设置
SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE),&cursor_info);
setColor(14, 0); //设置字体淡红色，背景为黑色
printf("\n\n\t\t 2048小游戏"); setColor(7, 0); //恢复白字黑底
printf("\n\t┌──────┬──────┬──────┬──────┐");
printf("\n\t│ │ │ │ │");
printf("\n\t├──────┼──────┼──────┼──────┤");
printf("\n\t│ │ │ │ │");
printf("\n\t├──────┼──────┼──────┼──────┤");
printf("\n\t│ │ │ │ │");
printf("\n\t├──────┼──────┼──────┼──────┤");
printf("\n\t│ │ │ │ │");
printf("\n\t└──────┴──────┴──────┴──────┘");
show( );
}
void show( ) //输出界面
{ for(i=0;i<4;i++)
for(j=0;j<4;j++)
{ gtxy(7*j+9,2*i+4); //gtxy(7*j+9, 2*i+4)是光标到指定位置输出数字
if(a[i][j]==0){printf(" "); setColor(7, 0); printf("│");}
else if(a[i][j]<10){ if (a[i][j] == 2) {setColor(14, 0); }
else if (a[i][j] == 4) {setColor(13, 0); }
else if (a[i][j] == 8) {setColor(12, 0); }
printf(" %d ", a[i][j]); setColor(7, 0); printf("│");
}
else if (a[i][j] < 100){if (a[i][j] == 16) {setColor(12, 0); }
else if (a[i][j] == 32) {setColor(10, 0); }
else if (a[i][j] == 64) {setColor(2, 0); }
printf(" %d ", a[i][j]); setColor(7, 0); printf("│");
}
else if (a[i][j] < 1000) {if (a[i][j] == 128) {setColor(9, 0); }
else if (a[i][j] == 256) {setColor(1, 0); }
else if (a[i][j] == 512) {setColor(13, 0); }
printf(" %d ", a[i][j]); setColor(7, 0); printf("│");
}
else if (a[i][j] < 10000) {if (a[i][j] == 1024) {setColor(5, 0); }
else {setColor(15, 0); }
printf(" %d ", a[i][j]); setColor(7, 0); printf("│");
}
}
if (jsk( ) == 0)
{ yes( ); if (over) { gtxy(9,12); setColor(10, 0);
printf("\n\n 游戏结束！是否继续? [ Y/N ]:"); }
}
}
void inkey( ) //按键输入
{ int key;
while (1)
{ key = getch( );
if (over) { if (key == 89|| key == 121) {rsgm( ); continue; }
else if (key == 78|| key == 110) { return; }
else continue; }
ifnum = 0;
if(key==224)key=getch( );
switch (key)
{ case 75: left( ); break;
case 77: right( ); break;
case 72: up( ); break;
case 80: down( );break;
}
if (score > best) { best = score; }
if (ifnum) { adnum( ); show( ); }
}
}
int jsk( ) //计算空格数
{ int n = 0;
for (i = 0; i < 4; i++)
{ for (j = 0; j < 4; j++) { if ( a[i][j] == 0) {n++;} } }
return n;
}
void left( ) //向左移动
{ for (i = 0; i < 4; i++)
{for (j = 1, k = 0; j < 4; j++)
{ if (a[i][j] > 0)
{ if ( a[i][k] == a[i][j])
{ a[i][k] *= 2; k++;
score = score + 2 * a[i][j];
a[i][j] = 0; ifnum = 1; }
else if ( a[i][k] == 0) { a[i][k] = a[i][j]; a[i][j] = 0; ifnum = 1; }
else { a[i][k + 1] = a[i][j]; if ((k + 1) != j) { a[i][j] = 0; ifnum = 1; }
k++; }
}
}
}
}
void right( ) //向右移动
{for (i = 0; i < 4; i++)
{for (j = 2, k = 3; j >= 0; j--)
{if (a[i][j] > 0)
{ if (a[i][k] == a[i][j])
{a[i][k] *= 2; k--; score = score + 2 * a[i][j]; a[i][j] = 0; ifnum = 1; }
else if ( a[i][k] == 0) {a[i][k] = a[i][j]; a[i][j] = 0; ifnum = 1; }
else { a[i][k - 1] = a[i][j]; if ((k - 1) != j) { a[i][j] = 0; ifnum = 1; } k--; }
}
}
}
}
void up( ) //向上移动
{for (i = 0; i < 4; i++)
{for (j = 1, k = 0; j < 4; j++)
{if (a[j][i] > 0)
{if ( a[k][i] == a[j][i]) { a[k][i] *= 2; k++;score = score + 2 * a[j][i];
a[j][i] = 0; ifnum = 1; }
else if ( a[k][i] == 0) { a[k][i] = a[j][i]; a[j][i] = 0; ifnum = 1; }
else { a[k + 1][i] = a[j][i]; if ((k + 1) != j) { a[j][i] = 0; ifnum = 1; }
k++; }
}
}
}
}
void down( ) //向下移动
{ for (i = 0; i < 4; i++)
{for (j = 2, k = 3; j >= 0; j--)
{if (a[j][i] > 0)
{if (a[k][i] == a[j][i])
{a[k][i] *= 2; k--;score = score + 2 * a[j][i]; a[j][i] = 0; ifnum = 1; }
else if (a[k][i] == 0) {a[k][i] = a[j][i]; a[j][i] = 0; ifnum = 1; }
else {a[k - 1][i] = a[j][i];
if ((k - 1) != j) {a[j][i] = 0; ifnum = 1; } k--; }
}
}
}
}
void adnum( ) //添加随机数
{ srand(time(0)); //启动随机数发生器
int n = rand( ) % jsk( );
for (int i = 0; i < 4; i++)
{for (int j = 0; j < 4; j++)
{ if (a[i][j] == 0) { if (n != 0) { n--; }
else {int k = rand() % 3;
if (k == 0 || k == 1) {a[i][j] = 2; return; }
else {a[i][j] = 4; return; } }
}
}
}
}
void yes( ) //游戏是否结束
{ for (int i = 0; i < 4; i++)
{for (int j = 0; j < 3; j++)
{if (a[i][j] == a[i][j + 1] || a[j][i] == a[j + 1][i]) {over = 0; return; }}
}
over = 1;
}
void gtxy(int x, int y) //控制光标位置的函数
{ COORD coord;
coord.X = x;
coord.Y = y;
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}
程序源码及运行结果如下所示（系统会自动去掉句首空格，排版较乱请见谅）：
#include<stdio.h>
int main()
{
int max,min;
int sum=0;
printf("请输入一个整数：");
scanf("%d",&max);
printf("请再输入一个整数：");
scanf("%d",&min);
if(min>max)
{
int temp;
temp = max;
max = min;
min = temp;
}
for(int i=min;i<=max;i++)
{
sum += i;
}
printf("两数之间的整数和是:%d\n",sum);
return 0;
}
int fun(int num1, int num2);
void main()
{
int num1, num2;
int sum;
printf("请输入两个整数：\n");
scanf("%d %d", &num1, &num2);
if(num1 > num2)
{
int tmp = num1;
num1 = num2;
num2 = tmp;
}
sum = fun(num1, num2);
printf("大于等于%d小于等于%d的所有整数和是%d\n", num1, num2, sum);
}
int fun(int num1, int num2)
{
int i, sum = 0;
for(i=num1; i<=num2; i++)
{
sum += i;
}
return sum;
}本回答被提问者采纳
void printSum(int a,int b);
int main(int argc,char* argv[])
{
int a=0,b=0;
printf("请输入两个整数。\n整数1:");
scanf("%d",&a);
printf("\n整数2:");
scanf("%d",&b);
if(a>=b){
printf("\n大于等于%d,小于等于%d的所有整数的和是%d",b,a);
printSum(a,b);
}else
{
printf("\n大于等于%d,小于等于%d的所有整数的和是%d",a,b);
printSum(b,a);
}
}
void printSum(int a,int b)
{
int i=0,sum=0;
for(i=b;i<=a;++i)
sum+=i;
printf("%d",sum);
}