141个C语言经典小程序

				#include 
				void main()
				{
				   int a,b,c;    /*定义整型变量 */
				
				   a = 12;
				   b = 3;
				   printf("a=%d ,b=%d\n",a,b);
				   getch();
				
				   c = a + b;          /* 加 */
				   printf("a+b=%d\n",c);
				   getch();
				
				   c = a - b;          /* 减 */
				   printf("a-b=%d\n",c);
				   getch();
				
				   c = a * b;         /* 乘 */
				   printf("a*b=%d\n",c);
				   getch();
				
				   c = a / b;          /* 除 */
				   printf("a/b=%d\n",c);
				   getch();
				
				   c = a % b;          /*求余 */
				   printf("a%%b=%d\n",c);
				   getch();
				
				   c = 12*a + b/2 - a*b*2/(a*c + b*2);
				   printf("12*a + b/2 - a*b*2/(a*c + b*2) = %d\n",c);
				   getch();
				
				   c = c/4+13*(a + b)/3 - a*b + 2*a*a;
				   printf("c/4+13*(a + b)/3 - a*b + 2*a*a = %d\n",c);
				   getch();
				
				   a = a + 1;        
				   printf("a=%d\n",a);
				   getch();
				
				   b = b * 5;
				   printf("b=%d\n",b);
				   getch();
				
				   a = b = c = 20;     
				   printf("a=%d,b=%d,c=%d\n",a,b,c);
				   getch();
				
				   a = b = c = 12*13/4;
				   printf("a=%d,b=%d,c=%d\n",a,b,c);
				
				}