Data Entry System
Hard
C
Control Flow
30 views
Problem Statement
Input multiple records (name and age) in a loop. After each entry ask "Add more? (y/n)". Validate input - name must not be blank, age must be between 1-120.
Input Format
Multiple records, each containing:
name (string)
age (integer)
After each record, a choice input: y or n.
name (string)
age (integer)
After each record, a choice input: y or n.
Output Format
Valid records stored successfully, input stops when user chooses n.
Example
Name: Rahul Age: 25 Add more? y Name: Anita Age: 130 Add more? n
Invalid age for second record, input stopped.
Constraints
• Name must not be blank
• Age must be between 1 and 120
• Choice must be y or n
• Age must be between 1 and 120
• Choice must be y or n
Concept Explanation
The program repeatedly takes user input and validates each field before accepting it.
Step-by-Step Explanation
1.Start a loop to enter records.
2.Ask the user to enter name.
3.Check if name is empty or blank:
• If yes, show an error and ask again.
4.Ask the user to enter age.
5.Check if age is between 1 and 120:
• If not, show an error and ask again.
6.Store the valid name and age.
7.Ask the user: "Add more? (y/n)".
8.If the input is y:
• Continue the loop.
9.If the input is n:
• Exit the loop.
10.End the program after all valid records are entered.
2.Ask the user to enter name.
3.Check if name is empty or blank:
• If yes, show an error and ask again.
4.Ask the user to enter age.
5.Check if age is between 1 and 120:
• If not, show an error and ask again.
6.Store the valid name and age.
7.Ask the user: "Add more? (y/n)".
8.If the input is y:
• Continue the loop.
9.If the input is n:
• Exit the loop.
10.End the program after all valid records are entered.
Concept Explanation
The program repeatedly takes user input and validates each field before accepting it.
Step-by-Step Explanation
1.Start a loop to enter records.
2.Ask the user to enter name.
3.Check if name is empty or blank:
• If yes, show an error and ask again.
4.Ask the user to enter age.
5.Check if age is between 1 and 120:
• If not, show an error and ask again.
6.Store the valid name and age.
7.Ask the user: "Add more? (y/n)".
8.If the input is y:
• Continue the loop.
9.If the input is n:
• Exit the loop.
10.End the program after all valid records are entered.
2.Ask the user to enter name.
3.Check if name is empty or blank:
• If yes, show an error and ask again.
4.Ask the user to enter age.
5.Check if age is between 1 and 120:
• If not, show an error and ask again.
6.Store the valid name and age.
7.Ask the user: "Add more? (y/n)".
8.If the input is y:
• Continue the loop.
9.If the input is n:
• Exit the loop.
10.End the program after all valid records are entered.
Input / Output Format
Input Format
Multiple records, each containing:
name (string)
age (integer)
After each record, a choice input: y or n.
name (string)
age (integer)
After each record, a choice input: y or n.
Output Format
Valid records stored successfully, input stops when user chooses n.
Constraints
• Name must not be blank
• Age must be between 1 and 120
• Choice must be y or n
• Age must be between 1 and 120
• Choice must be y or n
Examples
Input:
Name: Rahul
Age: 25
Add more? y
Name: Anita
Age: 130
Add more? n
Output:
Invalid age for second record, input stopped.
Example Solution (Public)
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main() {
char name[50];
int age;
char choice;
while (1) {
/* ---- Name Input ---- */
while (1) {
printf("nEnter name: ");
fgets(name, sizeof(name), stdin);
// Remove newline
name[strcspn(name, "n")] = '�';
if (strlen(name) == 0) {
printf("Error: Name cannot be blank.n");
} else {
break;
}
}
/* ---- Age Input ---- */
while (1) {
printf("Enter age (1-120): ");
if (scanf("%d", &age) != 1) {
printf("Error: Invalid age input.n");
while (getchar() != 'n'); // clear buffer
continue;
}
if (age < 1 || age > 120) {
printf("Error: Age must be between 1 and 120.n");
} else {
break;
}
}
while (getchar() != 'n'); // clear leftover newline
printf("Record added: %s, %d years oldn", name, age);
/* ---- Continue? ---- */
while (1) {
printf("Add more? (y/n): ");
scanf(" %c", &choice);
if (choice == 'y' || choice == 'Y') {
while (getchar() != 'n');
break;
} else if (choice == 'n' || choice == 'N') {
printf("Input finished.n");
return 0;
} else {
printf("Invalid choice. Enter y or n.n");
}
}
}
return 0;
}
Official Solution Code
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main() {
char name[50];
int age;
char choice;
while (1) {
/* ---- Name Input ---- */
while (1) {
printf("nEnter name: ");
fgets(name, sizeof(name), stdin);
// Remove newline
name[strcspn(name, "n")] = '�';
if (strlen(name) == 0) {
printf("Error: Name cannot be blank.n");
} else {
break;
}
}
/* ---- Age Input ---- */
while (1) {
printf("Enter age (1-120): ");
if (scanf("%d", &age) != 1) {
printf("Error: Invalid age input.n");
while (getchar() != 'n'); // clear buffer
continue;
}
if (age < 1 || age > 120) {
printf("Error: Age must be between 1 and 120.n");
} else {
break;
}
}
while (getchar() != 'n'); // clear leftover newline
printf("Record added: %s, %d years oldn", name, age);
/* ---- Continue? ---- */
while (1) {
printf("Add more? (y/n): ");
scanf(" %c", &choice);
if (choice == 'y' || choice == 'Y') {
while (getchar() != 'n');
break;
} else if (choice == 'n' || choice == 'N') {
printf("Input finished.n");
return 0;
} else {
printf("Invalid choice. Enter y or n.n");
}
}
}
return 0;
}
Please login to submit solutions.