算数转换程序1:#include<stdio.h>int main(){char c1 = 128;char c2 = 1;char c3 = c1+c2;//0111 1111//0000 0001//1000 0000,表示-127printf("%d\n",c3);return 0;}结果:-127请按任意键继续. . .程序2:#include<stdio.h>int main(){char c1 = 12;char c2 = 1;char c3 = c1+c2;//0000 1100//0000 0001//0000 1101printf("%d\n",c3);return 0;}结果:13请按任意键继续. . .