c语言问题，改错，哪里错了，考题求帮助

Question

#include<stdio.h>
int main()
{
int a,b；
printf("Input a,b:");
scanf("%f %f,",a,b);
c=2a+3b
printf(%f+%f=%f\n,&a,&b,&c);
return 0;
}

Answer 1

scanf应该用&a和&b，printf应该用a,b,c