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C | Storage Classes and Type Qualifiers | Question 19

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#include <stdio.h>
char *fun()
    static char arr[1024];
    return arr;
int main()
    char *str = "geeksforgeeks";
    strcpy(fun(), str);
    str = fun();
    strcpy(str, "geeksquiz");
    printf("%s", fun());
    return 0;

(A) geeksforgeeks (B) geeksquiz (C) geeksforgeeks geeksquiz (D) Compiler Error

Answer: (B)

Explanation: Note that arr[] is static in fun() so no problems of returning address, arr[] will stay there even after the fun() returns and all calls to fun() share the same arr[].
    strcpy(fun(), str);  // Copies "geeksforgeeks" to arr[]
    str = fun();    // Assigns address of arr to str
    strcpy(str, "geeksquiz");  // copies geeksquiz to str which is address of arr[]
    printf("%s", fun());   // prints "geeksquiz"

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Last Updated : 28 Jun, 2021
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