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\n",sizeof(short));          printf("size short int= %d\n",sizeof(short int));      printf("size char= %d\n",sizeof(char));      printf("size int = %d\n",sizeof(int));        printf("size a+i= %d\n",sizeof(a+i));            printf("size ai = %d\n",sizeof(ai));                  getchar()    ;}

运行结果：