学习代码第三天#include<stdio.h>int main(){printf("第一次");return 0;}#include<stdio.h>int main(){printf("a jie\n");printf("啊杰\n");return 0;}int main(){int a=0;int b=0;scanf("%d %d",&a,&b);int s=a+b;printf("s=%d\n",s);return 0;}