/in/main.c:10:39: error: unknown type name 'k'
 float Winrate(country_t A,country_t B,k);
                                       ^
/in/main.c: In function 'main':
/in/main.c:13:17: error: unused variable 'ran' [-Werror=unused-variable]
     int seed, k,ran;
                 ^~~
/in/main.c: In function 'Game':
/in/main.c:28:5: error: unknown type name 'node_t'
     node_t games[15];
     ^~~~~~
/in/main.c:28:12: error: unused variable 'games' [-Werror=unused-variable]
     node_t games[15];
            ^~~~~
/in/main.c: At top level:
/in/main.c:32:39: error: unknown type name 'k'
 float Winrate(country_t A,country_t B,k){
                                       ^
/in/main.c: In function 'Game':
/in/main.c:30:1: error: control reaches end of non-void function [-Werror=return-type]
 }
 ^
cc1: all warnings being treated as errors