Question 1th: The worthwhile conversion of signed and unsigned variables

#include  <stdio.h>char getchar (int x,int y) {         char c;        unsigned int a = x ;         (a + y > 10)  ?  (c =  1)  :  (c = 2);         return c;} Int main (void) {        char c1 = getchar (7,4);         char c2 = getchar (7,3);         char c3 = getchar (7,-7);         char c4 = getchar (7,-8);        //c1 =  1        printf ("c1 = %d\n", &NBSP;C1);         //c2  = 2        printf ("c2 = %d\n", &NBSP;C2);         /*c3 = 2  unsigned types and signed types for operation,         *  signed types are implicitly converted to unsigned types         * - 7 converted unsigned value plus 7 just above overflow, the result is 0        */         printf ("c3 = %d\n",  c3);         /* c4  = 1        * -8 converted unsigned value plus 7 becomes a very large integer (the difference of 1 will overflow)          */        printf ("c4 =  %d\n ",  c4);         return 0;}

This article is from the "Walt" blog, make sure to keep this source http://water3700348.blog.51cto.com/13058625/1965238

Question 1th: The worthwhile conversion of signed and unsigned variables