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What is the common error occurred while using scanf() statement in C language?
Problem
Common error occurred while reading string and numeric data using scanf() function in C language
Solution
The scanf() function is used to read formatted input from stdin in C language. It returns the whole number of characters written in it otherwise, returns a negative value.
Generally in case of scanf() function while reading string values after integer from the user, we get frequent errors.
Example
Following is a C program which reads roll number (integer value) and name of a student −
#include <stdio.h>
struct student {
char name[10];
int roll;
} s;
int main(){
printf("Enter information of students:
");
printf("
Enter roll number: ");
scanf("%d", &s.roll);
printf("
Enter name: ");
gets(s.name);
printf("
Displaying Information of students:
");
printf("
Roll number: %d\t", s.roll);
printf("
name:%s\t", s.name);
return 0;
}Output
In the above example, roll no: was read by the compiler, After that compiler is not able to read name and moves to next statement which was printf("Roll Number is: %d\t, s.roll);
and the output is "Roll number: 3 name: "
This is the common error occurred while reading string and numeric data using scanf() function in C language.
Enter information of students: Enter roll number: 3 Enter name: //error Displaying Information of students: Roll number: 3 name: //error
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