C，如何將值存儲在for循環中，是否可以在沒有數組的情況下完成？

Question

分配問：

程序必須計算房子 的表面，用戶必須輸入他的房間數量，然後程序必須要求每個房間的lenght和witdh。之後，程序必須顯示房子的表面。沒有提供公式，但房間的表面是長寬*寬。

我的應用程序的問題是，在for循環中，每個房間的所有長度和寬度的總和的值不會被記住。所以輸出是錯誤的。 它可以在沒有陣列的情況下完成嗎？因爲我還沒有上過這個課，還有很多其他任務需要完成。 非常感謝。

#include <stdio.h> 
#include <stdlib.h> 

main() 
{ 
int camere,lungime,latime,scamere,i,scamera,scameratotal,scasa,total; 


printf("Acest program calculeaza suprafata casei\n"); //this program lists the surface of the house 
printf("Cate camere are casa?\n"); // how many rooms do you have? 
scanf("%d",&camere); 

for(i=0;i<camere;i++) 
{ 

printf("Introduceti lungimea si latimea camerei %d\n",i); //enter the lenght and width of room %d 

scanf("%d %d",&lungime,&latime); 


scamera=lungime*latime; //surface of room %d is lenght*width 

printf("Suprafata camerei %d este %d\n",i,scamera); //states the surface of room %d (1 , 2 or 3 etc.) 


total = total + (lungime*latime); // total that i want the program to remember 
scasa=total*camere;     //surface of the house is total*number of rooms 


} 

printf("\nSuprafata casei este de %d metri",scasa); //the surface of the house , bad output , it's not total(sum of surfaces of each room)*number of rooms 
} 

Answer 1

聲明另一個的int稱爲總

在你的for循環結束時更新總

total += lungime*latime; 

總在循環之後將在年底的總建築面積

Answer 2

int total = 0; 

for(i=0;i<camere;i++) 
{ 
//ask length 
//ask width 
total = total + (length * width); 
} 

display total 

編輯：

#include <stdio.h> 
#include <stdlib.h> 

main() 
{ 
    int length = 0; 
    int width = 0; 
    int rooms = 0; 
    int total = 0; 

    printf("Acest program calculeaza suprafata casei\n"); 
    printf("Cate camere are casa?\n"); 
    scanf("%d", &rooms); 

    for(int i=0;i<rooms;i++) 
    { 
     printf("Introduceti lungimea si latimea camerei %d\n",i); 
     scanf("%d %d",&length,&width); 
     total = total + (length * width); 
    } 

    printf("Suprafata casei este de %d square meter", total); 
} 

如果這行不通，也許有在使用scanf函數的錯誤，但從來沒有使用過

Answer 3

您的代碼顯示出你剛剛第一printf之前做初始化的變量計算未定義的行爲。這裏是你的代碼與所有的變化解釋：

#include <stdio.h> 
#include <stdlib.h> //unwanted header 

int main() //use int main 
{ 
    int camere,lungime,latime,scamere,i,scamera,scameratotal=0,scasa; //some unused variables here! 

    //scamera=lungime*latime; 
    //scameratotal+=scamera; Undefined behaviour here! 

    printf("Acest program calculeaza suprafata casei\n"); 
    printf("Cate camere are casa?\n"); 
    scanf("%d",&camere); 

    for(i=0;i<camere;i++) 
    { 

     printf("Introduceti lungimea si latimea camerei %d\n",i+1); //room numbers start from 1 not 0 
     scanf("%d %d",&lungime,&latime); 
     scamera=lungime*latime; 
     scameratotal+=scamera; // add each scamera 
     printf("Suprafata camerei %d este %d\n",i+1,scamera); //i+1 here too 
    } 

    //scamera=lungime*latime; 
    //scasa=scamera*camere; unwanted lines here! 

    printf("Suprafata casei este de %d metri",scameratotal); //i think you need to display total surface area 
    return 0; //main returns int 
}