Main.c: In function 'main':
Main.c:6:13: error: 'k' undeclared (first use in this function)
    6 |             k=50-i-j;
      |             ^
Main.c:6:13: note: each undeclared identifier is reported only once for each function it appears in
Main.c:9:17: error: 'count' undeclared (first use in this function)
    9 |                 count++
      |                 ^~~~~
Main.c:9:24: error: expected ';' before '}' token
    9 |                 count++
      |                        ^
      |                        ;
   10 |             }
      |             ~           
Main.c:3:13: warning: unused variable 'k\U0000ff0ccount' [-Wunused-variable]
    3 |     int i,j,k，count=0;
      |             ^~~~~~~~