Question

所以，基本上我需要询问用户他想要添加多少个数字，然后让他输入数字，但我不知道如何添加数字而不将它们存储在同一个变量中，或者如何要添加相同的变量但具有不同的值，这在pascal中非常容易，但我不知道如何在C中执行此操作。

到目前为止，这是我的代码......

int main(int argc, char *argv[]) {
     int i, n, age;
     printf("How many numbers do you want to add?\n");
     scanf("%d", &n);
     for (i = 1; i <= n; i = i++) {
        printf("type in the number:\n");
        scanf("%d", &age);
     }
     return 0;
}

Answer 1

#include <stdio.h>
int main(){
    int n ,age,sum = 0;
    printf("How many numbers do you want to enter\n");
    scanf("%d",&n);
    while (n > 0) {
        printf("Enter the age");
        scanf("%d",&age);
        sum += age;
        n--;
    }
    printf("%d",sum);
    return 0;
}

这是需要少一个变量的例子。

Answer 2

要计算输入数字的总和，您可以为总和定义一个变量，并在输入时添加每个数字。

请注意，您的代码中存在未定义的行为：i = i++;您不能同时具有副作用并修改同一表达式中的i，除非存在序列点，否则您不太可能在初学者的代码中找到。只需i++即可增加i。

以下是修复和完成代码的方法：

#include <stdio.h>

int main(int argc, char *argv[]) {
     int i, n, age, total = 0;
     printf("How many numbers do you want to add?\n");
     if (scanf("%d", &n) == 1) {
         for (i = 0; i < n; i++) {
             printf("type in the number:\n");
             if (scanf("%d", &age) != 1)
                 break;
             total = total + age;
         }
         printf("the sum is %d\n", total);
     }
     return 0;
}

Answer 3

int main(){
     int i,n ,age,sum=0;
     printf("How many numbers do you want to enter\n");
     scanf("%d",&n);
     for(i = 1;i<=n;i++){
        printf("Enter the age");
        scanf("%d",&age);
        sum+=age;
     }
     printf("%d\n",sum);
     return;
}

Answer 4

使用数组。

int age[100];

并在你的for循环中，将所有年龄存储在该数组中。

scanf("%d",&age[i]);

Answer 5

我相信这是您寻找的最佳方式：

#include <stdio.h>

int main()
{
    int n;
    printf("how many numbers do you want to add?\n");
    scanf("%d", &n);
    if (n <= 0)
    {
        printf("Error\n");
        getchar();
        return 0;
    }

    int age[n];

    for (int i = 0; i < n; i++)
    {
        printf("type in a number:\n");
        scanf("%d", &age[i]);
        while (age[i] <= 0)
        {
            printf("Insert a positive number:\n");
            scanf("%d", &age[i]);
        }
    }
}

Answer 6

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

int main(){
    int i,n,sum=0;
    int *age;
    fflush(stdin);
    printf("How many numbers do you want to enter: ");
    scanf("%d",&n);
    printf("\n");
    age = (int*) malloc (sizeof(int)*n);
    if(age == NULL)
        return -1;

    for(i = 0; i < n; i++){
       printf("Enter the age: ");
       scanf("%d",&age[i]);
    }
    printf("\n");

    for(i = 0; i < n; i++)
        printf("Age[%d] %d\n",i, age[i]);

    /*Finally free the memory here*/`
    free(age);
    return 0;
}

Answer 7

<ServiceBehavior(ConcurrencyMode:=ConcurrencyMode.Multiple,
InstanceContextMode:=InstanceContextMode.PerSession,
UseSynchronizationContext:=False,TransactionIsolationLevel:=System.Transactions.IsolationLevel.Serializable,
TransactionTimeout:="00:00:30",
ReleaseServiceInstanceOnTransactionComplete:=False,
TransactionAutoCompleteOnSessionClose:=True
)>
Public Class RechnungInternalWS
Implements IRechnungInternalWS


<OperationBehavior(TransactionScopeRequired:=True, 
TransactionAutoComplete:=True)>
Public Function PdfVerarbeitungLoslegen(idAusGeplanteRechnungen As 
Integer, LettershopDrucken As Boolean) As RechnungPDFOriginal Implements 
IRechnungInternalWS.PdfVerarbeitungLoslegen

' do something
End Function

End Class

在循环中添加具有不同值的相同变量

7 个答案: