simplestack.c: In function ‘coolstuff’:
simplestack.c:1495:50: warning: format ‘%s’ expects argument of type ‘char *’, but argument 2 has type ‘int *’ [-Wformat=]
     int c;float a,b;scanf("%f",&a);while(scanf("%s%f",&c,&b)!=-1)c=='+'?a+=b:c=='-'?(a-=b):c=='*'?(a*=b):(a/=b);printf("%f",a);
                                                 ~^    ~~
                                                 %ls
simplestack.c: In function ‘implicit_input’:
simplestack.c:1291:1: warning: control reaches end of non-void function [-Wreturn-type]