1. Which of the following is a valid C statement for creating and initializing a

Question

1. Which of the following is a valid C statement for creating and initializing an array of floating point values? a. double densities [ 4.0]: b. int densities [4] = { 1.5, 2.3, 0.1, 4.6 ); c. double densities [ ] = { 1.5, 2.3, 0.1, 4.6); d. int densities [ : e, double densities = { 1.5, 2.3, 0.1, 4.6 ); f. none of the above Which of the following is a valid C code for assigning the same value to each element in an array of floating point values named masses, with a length of 7? 2. a. int j for (j=0; j

Explanation / Answer

1.

array of floating point values:

a. double densities[4.0];

it is not valid, because size should be number but it is decimal so it is not valid.

b. int densities[4]={1.5,2.3,0.1,4.6}

it is not valid, here data type holds integer not float type.

c. double  densities[4]={1.5,2.3,0.1,4.6}

it is valid

d.   int densities[];

not valid, data type holds int not float.

e.    double  densities={1.5,2.3,0.1,4.6}

not valid, here densities is a normal variable can't hold array values

2.

Assigning same float values to array mass length 7:

a. int j;

for(j=0;j<=7;j++)

{ masses[j]=2 }

not valid because j=0 to 7 size becomes 8 not 7.

b.

int j;

for(j=1;j<7;j++)

{ masses[j]=2 }

not valid because j=1 to 6 size becomes 6 not 7

c.

int j;

for(j=1;j<=7;j++)

{ masses=2 }

assigning to masses variable not to masses array variable.

d.

int j;

for(j=0;j<7;j++)

{ masses[j]=2 }

it is valid.

e.

double j;

for(j=0;j<7;j++)

{ masses[j]=2 }

it is not valid here j is floating type not integer, array index should be integer.

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