有符号变量与无符号变量的转换

#include<stdio.h>
#include<stdlib.h>


char getChar(int x,int y)
{
char c;
unsigned int a = x;
printf("%u\n",a+y);
return ((a + y > 10) ? (c = 1) : (c = 2));
}
int main(void)
{
char c;
c = getChar(7, 4);
printf("%d\n\n",c);

c = getChar(7, 3);
printf("%d\n\n", c);


c = getChar(7, -7);
printf("%d\n\n", c);


c = getChar(7, -8);
printf("%d\n\n", c);
system("pause");
return 0;
}
//1.有符号向无符号转换。
//2.补码在计算机的运算器中相加。