C语言编译时出现expected expression before ‘float’报错

再练习C语言二维数组函数时，定义了求每年降水总量，年平均降水量以及月平均降水量三个函数，通过GCC编译时出现expected expression before ‘float’报错，调式很久也无法解决，特来求助。

#include
#define MONTHS 12
#define YEARS 5
void year_total(float ar[][MONTHS],int years,int months);
void year_average(float ar[][MONTHS],int years,int months);
void month_average(float ar[][MONTHS],int years,int months);
int main(void)
{
 const float rain[YEARS][MONTHS]=
 {
         {4.3,4.3,4.3,3.0,2.0,1.2,0.2,0.2,0.4,2.4,3.5,6.6},
         {8.5,8.2,1.2,1.6,2.4,0.0,5.2,0.9,0.3,0.9,1.4,7.3},
         {9.1,8.5,6.7,4.3,2.1,0.8,0.2,0.2,1.1,2.3,6.1,8.4},
         {7.2,9.9,8.4,3.3,1.2,0.8,0.4,0.0,0.6,1.7,4.3,6.2},
         {7.6,5.6,3.8,2.8,3.8,0.2,0.0,0.0,0.0,1.3,2.6,5.2}
 };
 year_total(float rain[][MONTHS],5,12);
 year_average(float rain[][MONTHS],YEARS,MONTHS);
 month_average(float rain[][MONTHS],YEARs,MONTHS);
 return 0;
}

void year_total(float ar[][MONTHS],int years,int months)
{
 int n,k;
 float sum;
 for(n=0,sum=0.0;nfor(k=0;kprintf("THE %dyear is %lf inch\n",n,sum);
  }
  sum=0;
 }
}


void year_average(float ar[][MONTHS],int years,int months)
{
  int n,k;
 float sum;
 for(n=0,sum=0.0;nfor(k=0;kprintf("The yearly average is %lf inch",sum/years);
}


void month_average(float ar[][MONTHS],int years,int months)
{
  int n,k;
 float sum;
 for(n=0,sum=0.0;nfor(k=0;kprintf("The yearly average is %lf inch",sum/(years*months));
}

以下是报错截图：

求各位帮忙解答一下，实在是苦恼。

 
#include<stdio.h>
#define MONTHS 12
#define YEARS 5
void year_total(const float ar[][MONTHS],int years,int months);
void year_average(const float ar[][MONTHS],int years,int months);
void month_average(const float ar[][MONTHS],int years,int months);
int main(void)
{
 const float rain[YEARS][MONTHS]=
 {
         {4.3,4.3,4.3,3.0,2.0,1.2,0.2,0.2,0.4,2.4,3.5,6.6},
         {8.5,8.2,1.2,1.6,2.4,0.0,5.2,0.9,0.3,0.9,1.4,7.3},
         {9.1,8.5,6.7,4.3,2.1,0.8,0.2,0.2,1.1,2.3,6.1,8.4},
         {7.2,9.9,8.4,3.3,1.2,0.8,0.4,0.0,0.6,1.7,4.3,6.2},
         {7.6,5.6,3.8,2.8,3.8,0.2,0.0,0.0,0.0,1.3,2.6,5.2}
 };
 year_total( rain,5,12);
 year_average( rain,YEARS,MONTHS);
 month_average( rain,YEARS,MONTHS);
 return 0;
}
 
void year_total(const float ar[][MONTHS],int years,int months)
{
 int n,k;
 float sum;
 for(n=0,sum=0.0;n<years;n++)
{
  for(k=0;k<months;k++)
  {
     sum+=ar[n][k];
     printf("THE %dyear is %lf inch\n",n,sum);
  }
  sum=0;
 }
}
 
 
void year_average(const float ar[][MONTHS],int years,int months)
{
  int n,k;
 float sum;
 for(n=0,sum=0.0;n<years;n++)
 {
  for(k=0;k<months;k++)
     sum+=ar[n][k];
 }
 printf("The yearly average is %lf inch",sum/years);
}
 
 
void month_average(const float ar[][MONTHS],int years,int months)
{
  int n,k;
 float sum;
 for(n=0,sum=0.0;n<years;n++)
 {
  for(k=0;k<months;k++)
     sum+=ar[n][k];
 }
 printf("The yearly average is %lf inch",sum/(years*months));
}