sum_of_marks_of_three_students.c

main() {
	int marks[3][3], i, j, sum;
	for (i = 0; i < 3; i++){
		printf("Enter three subject marks of student %d\n", i+1);
		for (j = 0; j < 3; j++)
			scanf("%d", &marks[i][j]);
	}
	for (i = 0; i < 3; i++) {
		sum=0;
		for (j = 0; j < 3; j++)
			sum = sum + marks[i][j];
			printf("\nTotal marks of student %d is %d.", i+1, sum);
	}
}