error C2001: newline in constant

#include<stdio.h>
int main()
{
float a,b,c,d;
float temp;
scanf("%f %f %f %f, &a, &b, &c, &d);
temp=a
if(temp<b)
temp=b;
if(temp<c)
temp=c;
if(temp<d)
temp=d;
printf("\nmax=%f",temp);
return 0;

}

error C2146: syntax error : missing ´)´ before identifier temp
error C2001: newline in constant

我实在是不懂啦！各位大神！

#include<stdio.h>
int main()
{
float a,b,c,d;
float temp;
scanf("%f %f %f %f", &a, &b, &c, &d);//这里有修改，少了一个"
temp=a;//这里少了一个分号
if(temp<b)
temp=b;
if(temp<c)
temp=c;
if(temp<d)
temp=d;
printf("\nmax=%f",temp);
return 0;
}