c实验1

#include<stdio.h>

int main()

{

         int a,b,sum;

         a=123;

         b=456;

         sum=a+b;

         printf("sum is %d ",sum);

         return 0;

}                        

#include<stdio.h>

int main()

{

    char c1,c2;

    c1=97;

         c2=98;

         printf("c1=%c,c2=%c ",c1,c2);

    printf("c1=%d,c2=%d ",c1,c2);

         return 0;

}

#include<stdio.h>

int main()

{

    char c1,c2;

    c1=197;

         c2=198;

         printf("c1=%c,c2=%c ",c1,c2);

    printf("c1=%d,c2=%d ",c1,c2);

         return 0;

}

#include <stdio.h>

#include<math.h>

int main()

{

         int x,y,z;

         scanf("%d %d",&x,&y);

         z=x+1/abs(y);

         printf("%d %15.6f %e ",z,(double)z,(double)z);

         return 0;

}