Question

Given the following ConvDigits() function,

void ConvDigits (int inNum, int* tensVal, int* onesVal) {
*onesVal = inNum % 10;
*tensVal = inNum / 10;
}
1) What is the value of the variable numTens, after the following function call?
int numTens;
int numOnes;

ConvDigits (45, &numTens, &numOnes);

Answer 1

After calling ConvDigits(45, &numTens, &numOnes), the variable numTens will be 4. This is found by dividing the number 45 by 10 to extract the tens place value.

Step-by-step explanation:

The function ConvDigits() takes an integer inNum and separates its digits into the tens and ones place values. The ones value is determined by taking the remainder of income divided by 10, using the modulus operator (%). The tens value is determined by dividing inNum by 10 and considering only the integer part of the result, as it is an integer division.

When ConvDigits(45, &numTens, &numOnes) is called, the value of numTens will be 4, which is the result of inNum / 10 when inNum is 45. This is because the tens place value of the number 45 is 4 (40 when considering its actual value in the place value system), while the ones place value is 5, which is accordingly stored in numbness.