Main.c: In function 'main':
Main.c:4:22: error: expected expression before '%' token
    4 |          while(scanf(%d",&n)!=EOF) {
      |                      ^
Main.c:4:24: warning: missing terminating " character
    4 |          while(scanf(%d",&n)!=EOF) {
      |                        ^
Main.c:4:24: error: missing terminating " character
    4 |          while(scanf(%d",&n)!=EOF) {
      |                        ^~~~~~~~~~~~~
Main.c:5:35: error: expected ')' before '}' token
    5 |          printf("%d
",n*(n+1)/2);
      |                                   ^
      |                                   )
    6 | }
      | ~                                  
Main.c:4:15: note: to match this '('
    4 |          while(scanf(%d",&n)!=EOF) {
      |               ^
Main.c:6:1: error: expected expression before '}' token
    6 | }
      | ^
Main.c:3:14: warning: unused variable 'n' [-Wunused-variable]
    3 |          int n;
      |              ^
Main.c: At top level:
Main.c:7:1: error: expected identifier or '(' before 'return'
    7 | return 0;
      | ^~~~~~
Main.c:8:1: error: expected identifier or '(' before '}' token
    8 | }
      | ^