实验报告

#include<stdio.h>
int main()
{
 int a,b,sum;
 a=123;
 b=456;
 sum=a+b;
 printf("sum is %d\n",sum);
 return 0;
}

#include<stdio.h>
int main()
{
 char c1,c2;
 c1=97;
 c2=98;
 printf("c1=%c,c2=%c\n",c1,c2);
 printf("c1=%d,c2=%c\n",c1,c2);
 return 0;
}

#include<stdio.h>
#include<math.h>
int main()
{
 double x,y,z;
 scanf("%lf %lf",&x,&y);
 z=x+1/sqrt(y*y);
 printf("%d",z);
 printf("%lf",z);
 printf("%e",z);
 return 0;
}