Thread: this is what happens when i enter zero.help me please

this is the code but i don't understand why it breaks immediately when i enter zero it must ask the user for yes or no. i used scanf for it.i need help only for the if(x==0) part(starting with line 104) you dont need to look at the rest of the code thank you

Code:

#include <stdio.h>int main()
{
int x;
char y,n,a;
float z,e,p;
float sum=0;
printf("****************Online Shopping*****************\n");
    printf("1- Apple    5$\n");
    printf("2- Orange    7$\n");
    printf("3- Tomate    9$\n");
    printf("4- Meat       50$\n");
    printf("5- Chicken    25$\n");
    printf("6- Milk       2.5$\n");
    printf("7- Yoghurt    4.2$\n");
    printf("8- Egg       1.1$\n");
    printf("9- Lemonate    1.9$\n");
    printf("10-Coke      2.3$\n");
    printf("************************************************\n");
        while(x!=-1 && x!=0){
                 scanf("%d",&x);
                if(x!=-1 && x!=0){
        scanf("%f",&z);
                if (x == 1){
                      
            
                printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f kg Apple: %.2f$\n", z, 5 * z);
                sum += 5 * z;}
            
            if (x == 2){
            
                printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f kg Orange: %.2f$\n", z, 7 * z);
                sum += 7 * z;}
            
            if (x == 3){
            
                printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f kg Tomate: %.2f$\n", z, 9 * z);
                sum += 9 * z;}
            
            if (x == 4){
            
                printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f kg Meat: %.2f$\n", z, 50 * z);
                sum += 50 * z;}
            
            if (x == 5){
            
                printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f kg Chicken: %.2f$\n", z, 25 * z);
                sum += 25 * z;}
            
            if (x == 6){
            
                printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f lt Milk: %.2f$\n", z, 2.5*z);
                sum += 2.5*z;}
            
            if (x == 7){
            
                printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f kg Yoghurt: %.2f$\n", z, 4.2*z);
                sum += 4.2*z;}
            
            if (x == 8){
            
                printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f box Egg: %.2f$\n", z, 1.1*z);
                sum += 1.1*z;}
            
            if (x == 9){
            
                printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f lt Lemonade: %.2f$\n", z, 1.9*z);
                sum += 1.9*z;
                                 }
                 
                                 }
                 if (x ==-1){
        printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): -1\n");
                           scanf("%f",&e);
                        printf("Your total price is %.2f$. How much money you enter: %.2f$\n",sum,e);
               


            
                      
                        if(e>=sum){
                    printf("Total price has been paid. Your remaining money %.2f$\n",e-sum);
            printf("Have a good day...");
                           break;
                         }
                          if(e<sum){
                              scanf("%f",&p);
                              printf("Your money is not enough. You must add %.2f$ for total price. How much money you enter: %.2f$\n",sum-e,p);
                               e+=p;
            
                       
                      
                          
                          
                           if(e>=sum){
                        printf("Total price has been paid. Your remaining money %.2f$.\n",e-sum);
            printf("Have a good day...");
                         break;
                         }
                      


                  }
                     
                    if(x==0){
    
            scanf("%c",&a);
            if(a=='y'){
            printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): Are you sure (y/n) : y\n");
            printf("Have a good day");
            break;
            }
            if(a=='n'){
            printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): Are you sure (y/n) : n\n");
            continue;
            } 
        
            }
                       }   
            }
            
         return 0;

                       }

Did a monkey indent your code?

Your indentation needs work.

Code:

#include <stdio.h>
int main()
{
  int x;
  char y, n, a;
  float z, e, p;
  float sum = 0;
  printf("****************Online Shopping*****************\n");
  printf("1- Apple    5$\n");
  printf("2- Orange    7$\n");
  printf("3- Tomate    9$\n");
  printf("4- Meat       50$\n");
  printf("5- Chicken    25$\n");
  printf("6- Milk       2.5$\n");
  printf("7- Yoghurt    4.2$\n");
  printf("8- Egg       1.1$\n");
  printf("9- Lemonate    1.9$\n");
  printf("10-Coke      2.3$\n");
  printf("************************************************\n");
  while (x != -1 && x != 0) {
    scanf("%d", &x);
    if (x != -1 && x != 0) {
      scanf("%f", &z);
      if (x == 1) {
        printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f kg Apple: %.2f$\n",
             z, 5 * z);
        sum += 5 * z;
      }
      if (x == 2) {
        printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f kg Orange: %.2f$\n",
             z, 7 * z);
        sum += 7 * z;
      }
      if (x == 3) {
        printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f kg Tomate: %.2f$\n",
             z, 9 * z);
        sum += 9 * z;
      }
      if (x == 4) {
        printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f kg Meat: %.2f$\n",
             z, 50 * z);
        sum += 50 * z;
      }
      if (x == 5) {
        printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f kg Chicken: %.2f$\n",
             z, 25 * z);
        sum += 25 * z;
      }
      if (x == 6) {
        printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f lt Milk: %.2f$\n",
             z, 2.5 * z);
        sum += 2.5 * z;
      }
      if (x == 7) {
        printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f kg Yoghurt: %.2f$\n",
             z, 4.2 * z);
        sum += 4.2 * z;
      }
      if (x == 8) {
        printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f box Egg: %.2f$\n",
             z, 1.1 * z);
        sum += 1.1 * z;
      }
      if (x == 9) {
        printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): %.2f lt Lemonade: %.2f$\n",
             z, 1.9 * z);
        sum += 1.9 * z;
      }
    }
    if (x == -1) {
      printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): -1\n");
      scanf("%f", &e);
      printf("Your total price is %.2f$. How much money you enter: %.2f$\n",
             sum, e);
      if (e >= sum) {
        printf("Total price has been paid. Your remaining money %.2f$\n",
               e - sum);
        printf("Have a good day...");
        break;
      }
      if (e < sum) {
        scanf("%f", &p);
        printf("Your money is not enough. You must add %.2f$ for total price. How much money you enter: %.2f$\n",
             sum - e, p);
        e += p;
        if (e >= sum) {
          printf("Total price has been paid. Your remaining money %.2f$.\n",
                 e - sum);
          printf("Have a good day...");
          break;
        }
      }
      if (x == 0) {
        scanf("%c", &a);
        if (a == 'y') {
          printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): Are you sure (y/n) : y\n");
          printf("Have a good day");
          break;
        }
        if (a == 'n') {
          printf("Please enter your choice and quantity(Enter '0' for exit, '-1' for total price): Are you sure (y/n) : n\n");
          continue;
        }
      }
    }
  }

  return 0;
}

Your variable names are awful.
Use descriptive names like productID, productQuantity, ProducePrice.

Now with better indentation, it's clear to see that the x==0 on line 93 just isn't going to happen because the x==-1 on line 70 is a guard for it.
That is, if you ever make it past line 70, then line 93 will always evaluate to false.

Perhaps a brace is in the wrong place.

Also, since you're mixing %c with other formats, it's a good idea to have a leading space in the format, like so

Code:

        scanf(" %c", &a);