52 Introduction to C++ Programming and Graphics
char q[]= ’zei’;string n[3]={"who", "am", "I?"};string b[]={"who", "are", "they?"};The size ofqis four, as a final 0 is appended to indicate the end of a character
array.
To declare and initialize a 2×2 matrixAwhose elements are real numbers
registered in double precision, we write
double A[2][2] ={{1.0, 2.0},{4.5,-3.5}};or
double A[][] ={{1.0, 2.0},{4.5,-3.5}};which sets:A[0][0] = 1.0,A[0][1] = 2.0,A[1][0] = 4.5,A[1][1] =− 3 .5.
Thus, the matrix elements are initialized row-by-row.
Similarly, we can write
char D[2][3]={{60, 61, 65},{62, 63, 66}};string C[2][3]={{"who", "am", "I?"},{"who", "is", "she?"}};string C[][]={{"who", "am", "I?"},{"who", "is", "she?"}};Problems
3.2.1.A vector is declared and initialized as:
double v[128] ={4.0};What are the components of this vector?3.2.2.A character vector is declared and initialized as:
char v[128] ={ 67 };
What are the components of this vector?