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Programming in C MCQ - Find the Output

46 Find the output of the following C code (assume #include <stdio.h> and that the code is inside int main(void)):

int i = 1, j, result = 0;
while (i <= 4) {
    for (j = 1; j <= i; j++) {
        if (j % 2 == 0)
            result += i;
        else
            result += j;
    }
    i++;
}
printf("%d", result);

Contributions for i=1,2,3,4 are 1,3,7,12, totaling 23.

47 Find the output of the following C code (assume #include <stdio.h> and that the code is inside int main(void)):

int i = 1, j = 0;
while (i < 10) {
    for (j = 0; j < i; j += 2)
        printf("*");
    i = i * 2 + 1;
}
printf("%d", j);

The inner loops print 1, 2, and 4 stars for i=1,3,7. The last inner loop ends with j=8.

48 Find the output of the following C code (assume #include <stdio.h> and that the code is inside int main(void)):

int a = 2, b = 15, count = 0;
do {
    a += 3;
    b -= 2;
    count++;
} while (a < b && count < 5);
printf("%d %d %d", a, b, count);

After three passes a=11, b=9, count=3, so a<b is false.

49 Find the output of the following C code (assume #include <stdio.h> and that the code is inside int main(void)):

int i, j, k = 0;
for (i = 1; i <= 3; i++) {
    j = 1;
    while (j <= i) {
        k++;
        if (k % 2 == 0) {
            j++;
            continue;
        }
        k += j;
        j++;
    }
}
printf("%d", k);

The six inner iterations leave k at 2, 4, 7, 8, 11, and 12. The continue branch skips the extra addition when the incremented k is even.

50 Find the output of the following C code (assume #include <stdio.h> and that the code is inside int main(void)):

int i, j, sum = 0;
for (i = 1; i <= 4; i++) {
    j = 0;
    do {
        j++;
        if (j == i)
            continue;
        if (i + j > 5)
            break;
        sum += i * j;
    } while (j < 4);
}
printf("%d", sum);

Tracing the do-while for each outer value and applying continue before the break check gives a final sum of 30. Continue still evaluates the do-while condition.

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Question:

Find the output of the following C code (assume #include <stdio.h> and that the code is inside int main(void)):int i, j, sum = 0; for (i = 1;…

A. 24
B. 30
C. 32
D. 40

Correct answer: C

Explanation:

Only odd i+j pairs contribute: 6 for i=1, 8 for i=2, and 18 for i=3, totaling 32.

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Question

Find the output of the following C code (assume #include <stdio.h> and that the code is inside int main(void)):

int i, j, sum = 0;
for (i = 1; i <= 3; i++) {
    for (j = 1; j <= 4; j++) {
        if ((i + j) % 2 == 0)
            continue;
        sum += i * j;
    }
}
printf("%d", sum);

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