錯誤：無效的操作數爲二進制+（有'浮動*'和'浮動*'）

Question

有人可以幫我嗎？我唯一錯的是我不能在最後打印出我的總數從三項中增加cost1，cost2和cost3。我得到上述錯誤。

#include <stdio.h> 
#include <string.h> 

char name1[100]; 
char name2[100]; 
char name3[100]; 
char price1[100]; 
char price2[100]; 
char price3[100]; 
float cost1[100]; 
float cost2[100]; 
float cost3[100]; 
float total[300]; 

int main() 
{ 
printf("Welcome to the UT super mart*-*-\n"); 
printf("Enter the name of your item 1: "); 
fgets(name1, sizeof(name1), stdin); 
printf("Enter the price of %s: ", name1); 
fgets(price1, sizeof(price1), stdin); 
sscanf(price1, "%f", &cost1); 

printf("Enter the name of your item 2: "); 
fgets(name2, sizeof(name2), stdin); 
printf("Enter the price of %s: ", name2); 
fgets(price2, sizeof(price2), stdin); 
sscanf(price2, "%f", &cost2); 

printf("Enter the name of your item 3: "); 
fgets(name3, sizeof(name3), stdin); 
printf("Enter the price of %s: ", name3); 
fgets(price3, sizeof(price3), stdin); 
sscanf(price3, "%f", &cost3); 

total=cost1+cost2+cost3; /*this is what causes the error*/ 
printf("Your total is: %f\nThank you for shopping at the UT super mart.", total); 
return(0); 
} 

Answer 1

你的錯誤是將成本變量聲明爲數組。不需要。

float cost1[100]; 
float cost2[100]; 
float cost3[100]; 
float total[300]; 

應該

float cost1; 
float cost2; 
float cost3; 
float total;