Question

Consider the following C program: int fun(int *i) { *i += 5; return 4; } 352 Chapter 7 Expressions and Assignment Statements void main() { int x = 3; x = x + fun(&x); } What is the value of x after the assignment statement in main, assuming a. operands are evaluated left to right. b. operands are evaluated right to left

Answer 1

Answer:

a. operands are evaluated left toright. 7

b. operands are evaluated right toleft. 12

Explanation:

a. operands are evaluated left toright. 7

b. operands are evaluated right toleft. 12

left to right

int fun (int *i) {

*i +=5; we add 5to x making x 8

return4; we return 4 tomain

}

void main ( ) {

int x = 3;

x = x + fun(&x); x starts at 3 in fun it ischanged to 8 but the 3 is already being used the 4 fromfun is added (3+4) to it making it 7

}

right toleft x starts at 3 in fun x gets changed to 8 and fun is returned as 4so we have 4 + 8 = 12

Paraphrasing

left to right it's is 3 + 4 =7 original value of x is used

right to left it is 4 + 8 =12 x is used as it was changed by fun, since fun was alreadyexecuted