/in/foo.cc: In function 'int main()':
/in/foo.cc:20:64: warning: format '%c' expects argument of type 'char*', but argument 4 has type 'int*' [-Wformat=]
   scanf("%d %s %c %f",&s[i].num,s[i].name,&s[i].sex,&s[i].score);
                                                                ^