8/8/2019 EECO-I-C6-exercises

1/4

10/5/2008

1

1

Exercise 1

Write the statement that would declare a 10-element integer array andinitialize all its elements to 1 and print the individual values.

#include

void main( ){

int array[10];

// elements referred using subscriptsfor(int i=0; i

8/8/2019 EECO-I-C6-exercises

2/4

10/5/2008

2

3

Exercise 3 Given the following array, write code to initialize all the array elements to 22:

int TwentyTwo [22];Print the individual value, every 5 values on a line.

#include

int main( ){

int TwentyTwo[22];

for(int i=0; i

8/8/2019 EECO-I-C6-exercises

3/4

10/5/2008

3

5

Exercise 5

What is wrong with the following code fragment?

int x, y;int array[3][10];

main(){

for ( x = 0; x < 10; x++ )for ( y = 0; y < 3; y++ )

array[x][y] = 0;return 0;

}

6

Exercise 6

What is wrong with the following?

int array[10];int x = 1;

main(){

for ( x = 1; x

8/8/2019 EECO-I-C6-exercises

4/4

10/5/2008

4

7

Exercise 7What is wrong with the following code fragment?

#include

void main(){

int a, t1[10],b,t2[10]; printf("%u\n",(unsigned int)&a); // se afiseaza adresa variabilei a ca intreg zecimal fara semn printf("%u\n",(unsigned int)t1); // se afiseaza adresa tabloului t1 ca intreg zecimal fara semn printf("%u\n",(unsigned int)&b); // se afiseaza adresa variabilei a ca intreg zecimal fara semn printf("%u\n",(unsigned int)t2); // se afiseaza adresa tabloului t2 ca intreg zecimal fara semn

/*obs. Alocarea se face pe stiva in ordine descrescatoare a adreselor, in ordinea declaratiilor,

deci variabila a este alocata la adresa cea mai mare, urmeaza apoi tabloul t1, etc.Diferenta dintre adresa variabilei a si a tabloului t1 este (sizeof(int)*10)Diferenta dintre adresa tabloului t1 si a variabilei b este sizeof(int)Diferenta dintre adresa variabilei b si a tabloului t2 este (sizeof(int)*10)

*/t1[10]=11; // atribuirea este incorecta, deoarece indexul utilizat este prea mare -

// valorile corecte sunt 0, 1,..,9.// valoarea 11 se depune in zona de memorie care a fost alocata pentru alta// variabila decat tabloul t1,

// si anume in variabila a.t2[10]=99; // situatie similara celei precedente, ca urmare valoarea 99 este preluata de

// variabila b. printf("a=%d\n",a); printf("b=%d\n",b);

}

8

Exercise 8 Write a program that declares two 20-element char arrays named name and

copy_name . Read from keyboard a string. Print every character of stringusing both direct access and indirect access. Copy the string name incopy_name end than print they on the screen.

#include int main( ){ char name[20], copy_name[20];

int i;printf("Input a string: );scanf(%s, name);printf("The readed string is: %s\n, name);

printf("The characters of string are:\n " );for(i=0; name[i] ; i++) // the '\0' finishes the string;

printf(%s , name[i]);printf(\n);

printf("All characters of array are :\n);for(i=0; i