1.1两个char类型数据相加后，转化为int类型

#include<stdio.h>
main()
{

      char a = 127;
      char i=0;
      char ai=0;
      ai= a+i; 
      printf("size short= %d
",sizeof(short));
          printf("size short int= %d
",sizeof(short int));
      printf("size char= %d
",sizeof(char));
      printf("size int = %d
",sizeof(int));  
      printf("size a+i= %d
",sizeof(a+i));      
      printf("size ai = %d
",sizeof(ai));            

      getchar()    ;

}

运行结果：