有以下程序 #include void fun( int x, int y, int *c, int *d ) { *c = x+y; *d = x-y; } main() { int a=4, b=3, c=0, d=0; fun ( a, b, &c, &d ); printf( "%d %d\n" , c, d ); } 程序的输出结果是