View Compilation Error

0_0_38941520_24168.c: In function 'main':
0_0_38941520_24168.c:3:1: error: parameter 'T' is initialized
    3 | int T=0;
      | ^~~
0_0_38941520_24168.c:4:1: error: expected declaration specifiers before 'scanf'
    4 | scanf("%d",&T);
      | ^~~~~
0_0_38941520_24168.c:5:7: error: declaration for parameter 'b' but no such parameter
    5 | int a,b;
      |       ^
0_0_38941520_24168.c:5:5: error: declaration for parameter 'a' but no such parameter
    5 | int a,b;
      |     ^
0_0_38941520_24168.c:3:5: error: declaration for parameter 'T' but no such parameter
    3 | int T=0;
      |     ^
0_0_38941520_24168.c:7:21: error: 'num' undeclared (first use in this function)
    7 | for (int i = 0; i < num; i++)
      |                     ^~~
0_0_38941520_24168.c:7:21: note: each undeclared identifier is reported only once for each function it appears in