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非常好，感谢

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感谢分享

thanks for sharing

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1. // Program P5.x
   
2. //print the sum and count of several numbers entered by a user
   
3. #include <stdio.h>
   
4. int main() {
   
5.     int num, sum = 0, n = 0;
   
6.     printf("Enter a number (0 to end): ");
   
7.     scanf("%d", &num);
   
8.     while (num != 0) {
   
9.        n = n + 1;
   
10.        sum = sum + num;
    
11.        printf("Enter a number (0 to end): ");
    
12.        scanf("%d", &num);
    
13.     }
    
14.     if (n == 0) printf("\nNo numbers entered\n");
    
15.     else {
    
16.        printf("\n%d numbers were entered\n", n);
    
17.        printf("The sum is %d\n", sum);
    
18.        printf("The average is %3.2f\n", (double) sum/n);
    
19.     }
    
20. }

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