error C2085: 'f' : not in formal pa

#includeint main(){ //这少花括号 int f,m,a,s; float b; scanf("%d,%d,%d,%d",&f,&m,&a,&s); switch(s) { case 1: b=(f+m)*1.08/2; break; case 0: b=(f*0.923+m)/2; break; default