第一次实验

#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>

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()

{

 int a,b,sum;

 a=123;

 b=456;  

sum=a+b;

 printf("sum is%d ",sum);

 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 %15.6f %e ",(int)z,z,z);
while(1)
return 0;
}