例 1.2 求两数之和
1 #include <stdio.h>
2 main()
3 {
4 int a,b,sum;/*这是定义了三个整型变量*/
5 a=1234;
6 b=5678;
7 sum=a+b;
8 printf("sun=%d\n",sum);//打印a和b 之和
9 }
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