实验1

#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;
}

 变更c1,c2

#include<stdio.h>
int main()
{   char c1,c2;
  c1=197;
  c2=198;
  printf("c1=%c,c2=%c\n",c1,c2);
  printf("c1=%d,c2=%d\n",c1,c2);
  return 0;
}

#include<stdio.h>
#include<math.h>
int main()
{   float x,y,z;
    scanf("%f%f",&x,&y);
    z=x+1/fabs(y);
 printf("z=%d\n",int(z));
    printf("z=%15.6f\n",z);
    printf("z=%e\n",z);
    return 0;
}

实验1

原文：https://www.cnblogs.com/P201821430004/p/10689864.html