C Programming Questions and Answers

How many bytes of memory will the following code reserve?

#include < stdio . h >#include < stdlib . h >int main()
{
    int *p;
    p = (int *)malloc(256 * 256);
    if(p == NULL)
        printf("Allocation failed");
    return0;
}

Point out the error in the following program.

#include#include < stdlib . h >int main()
{
    int *a[3];
    a = (int*) malloc ( sizeof (int) *3);
    free(a);
    return0;
}

Point out the error in the following program.

#include#include < stdlib . h >int main()
{
    char *ptr;
    *ptr = (char)malloc(30);
    strcpy(ptr, "RAM");
    printf("%s", ptr);
    free(ptr);
    return0;
}

How will you free the memory allocated by the following program?

#include#include#define MAXROW 3#define MAXCOL 4int main()
{
    int **p, i, j;
    p = (int **) malloc(MAXROW * sizeof(int*));
    return0;
}

What will the function rewind() do?

What will the function rewind() do?

What will be the output of the program?

#include < stdio . h >#includeint main()
{
    float i = 2.5;
    printf("%f, %d", floor(i), ceil(i));
    return0;
}

What will be the output of the program?

#include < stdio . h >int main()
{
    int i;
    i = scanf("%d %d", &i, &i);
    printf("%d\n", i);
    return0;
}

What will be the output of the program?

#include < stdio . h >int main()
{
    int i;
    char c;
    for(i=1; i <= 5; i++)
    {
        scanf("%c", &c); /* given input is 'b' */
        ungetc(c, stdout);
        printf("%c", c);
        ungetc(c, stdin);
    }
    return0;
}

What will be the output of the program?

#include < stdio . h >#includeint main()
{
    char *i = "55.555";
    int result1 = 10;
    float result2 = 11.111;
    result1 = result1+atoi(i);
    result2 = result2+atof(i);
    printf("%d, %f", result1, result2);
    return0;
}