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C program to read and print name, where memory for variable should be declared at run time

mahmoud2506
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2022-05-03
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C program to read and print name, where memory for variable should be declared at run time

This program is an example of Dynamic Memory Allocation, where maximum length of the name (number of characters) to be read at run time, program will declare memory for entered length of the name using malloc(), then program will read the name and print.

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mahmoud2506
2022-05-03
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Consider the program:

#include <stdio.h>
#include <stdlib.h>

int main()
{
    char* name;
    int limit;

    printf("Enter maximum length of name: ");
    scanf("%d", &limit);

    //allocate memory dynamically
    name = (char*)malloc(limit * sizeof(char));

    printf("Enter name: ");
    getchar(); //get extra character to clear input buffer
    gets(name);
    //scanf("%*[^\n]%1*[\n]",name);

    printf("Hi! %s, How are you?\n", name);

    //free dynamically allocated memory
    free(name); // <-- Hey, dont forget.

    return 0;
}

Output

Enter maximum length of name: 30
Enter name: Mayank Singh
Hi! Mayank Singh, How are you?

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