例子
char *str = "12345678";
for(char i=0;i<8;i++) {
printf("str[%d] = %c(%d) \n", i,*str,*str);
str++;
}
输出
str[0] = 1(49)
str[1] = 2(50)
str[2] = 3(51)
str[3] = 4(52)
str[4] = 5(53)
str[5] = 6(54)
str[6] = 7(55)
str[7] = 8(56)