有以下程序 #include main() { char *s="12134"; int k=0, a=0 ; while( s[ k +1 ] ) { k++; if ( k % 2 ==0 ) { a = a + ( s[ k ] - '0' +1 ) ; continue; } a = a + ( s[ k ] - '0' ); } printf (" k=%d a=%d\n", k, a ); } 程序运行后的输出结果是