负数转化为整数

负数转化为整数
int a = -1321313;
12
13         printf("1a: %d\n",a);
14         if (a < 0){
15
16           a = -a;
17         }
18
19
20         printf("2a: %d\n",a);


整数 转化为字符
b= a%10;
27
28          buff[i++] = b+'0';