Question

Hello, I need help with the following C code. This program asks the user to enter three numbers and outputs the sum on the screen , all im trying to do is have the program reprompt the user for a number if anything other than a number is entered for each of the entries. I wanted to use do while for each of the functions but that did not work

for example:

Enter Number 1: 2
Enter Number 2: Hello
Enter Number 2: 8
Enter Number 3: 10

Please try to make minimal changes to the code, be sure to keep scanf, and printf. NO libraries besides stdio.h.

int main(void) {
    int a,b,c,ans,n;

    do{

            printf("Enter 1st number: ");
            scanf("%d", &a);
            printf("\n");

            printf("Enter second number: ");
            scanf("%d", &b);
            printf("\n");

            printf("Enter 3rd number: ");
            scanf("%d", &c);
            printf("\n");

        ans = a+b+c;

        printf("Answer is %d\n\n", ans);

        printf("Press 1 to start over, or 0 to quit...");
        scanf("%d",&n);
        printf("\n");

}while (n!=0);

   return 0;
}

Answer 1

#include<stdio.h>
int main(void) {
int a,b,c,ans,n;

do{

do
{
printf("Enter 1st number: ");
           char term;
           fflush(stdin);
           if(scanf("%d%c", &a, &term) != 2 || term != '\n')
           continue;
           else
           break;

           }while(true);

           do
{
printf("Enter second number: ");
           char term;
           fflush(stdin);
           if(scanf("%d%c", &b, &term) != 2 || term != '\n')
           continue;
           else
           break;

           }while(true);
          
           do
{
printf("Enter 3rd number: ");
           char term;
           fflush(stdin);
           if(scanf("%d%c", &c, &term) != 2 || term != '\n')
           continue;
           else
           break;

           }while(true);

ans = a+b+c;

printf("Answer is %d\n\n", ans);

printf("Press 1 to start over, or 0 to quit...");
scanf("%d",&n);
printf("\n");

}while (n!=0);

return 0;
}

Sample Output:-