#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=%d\n",c1,c2);

return 0;}

#include<stdio.h>

int main ()

{

float x,y,z;

scanf("%f,%f",&x,&y);

if(y<0)

 y=-y;

z=(x+1/y);

printf("%d\n%15.6f\n%e\n",(int)z,z,z);

while(1)

return 0;

}