C语言40学时 例1.2 1.include stdio. h 2.man()求两数之和* 3.{inta,b,sum;/定义变量 4.a=123b=456; 5. sum=a+b 6. printf(" Insum is %dn", sum) 运行结果: sum is 579C语言４０学时 例1.２ 1. #include "stdio.h" 2. main( ) /*求两数之和*/ 3. {int a,b,sum; /*定义变量*/ 4. a=123,b=456; 5. sum=a+b; 6. printf("\nsum is %d\n",sum); 7. } 运行结果： sum is 579