Header file:
string.h
Synopsis:
void *memset(void *str, int ch, size_t num);
Description:
It places character ch in first num bytes of str and returns str.
memset function C example:
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
struct student {
char name[30];
char course[30];
};
int main() {
struct student *ptr1, *ptr2;
ptr1 = (struct student *) malloc (sizeof (struct student));
ptr2 = (struct student *) malloc (sizeof (struct student));
printf("Student name:");
fgets(ptr1->name, 30, stdin);
printf("Course: ");
fgets(ptr1->course, 30, stdin);
printf("\nResult before memset:\nStudent name: %s", ptr1->name);
printf("Course: %s\n", ptr1->course);
ptr2 = (struct student *) memset(ptr1, 'c', sizeof (struct student));
ptr2->name[29] = '\0';
ptr2->course[29] = '\0';
printf("\nResult after memset:\nStudent name: %s\n", ptr2->name);
printf("Course: %s\n", ptr2->course);
return 0;
}
#include<stdlib.h>
#include<string.h>
struct student {
char name[30];
char course[30];
};
int main() {
struct student *ptr1, *ptr2;
ptr1 = (struct student *) malloc (sizeof (struct student));
ptr2 = (struct student *) malloc (sizeof (struct student));
printf("Student name:");
fgets(ptr1->name, 30, stdin);
printf("Course: ");
fgets(ptr1->course, 30, stdin);
printf("\nResult before memset:\nStudent name: %s", ptr1->name);
printf("Course: %s\n", ptr1->course);
ptr2 = (struct student *) memset(ptr1, 'c', sizeof (struct student));
ptr2->name[29] = '\0';
ptr2->course[29] = '\0';
printf("\nResult after memset:\nStudent name: %s\n", ptr2->name);
printf("Course: %s\n", ptr2->course);
return 0;
}
Output:
jp@jp-VirtualBox:~/cpgms/chap5$ ./a.out
Student name:John milton
Course: Computer Science
Result before memset:
Student name: John milton
Course: Computer Science
Result after memset:
Student name: ccccccccccccccccccccccccccccc
Course: ccccccccccccccccccccccccccccc
Student name:John milton
Course: Computer Science
Result before memset:
Student name: John milton
Course: Computer Science
Result after memset:
Student name: ccccccccccccccccccccccccccccc
Course: ccccccccccccccccccccccccccccc
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