Nested if/if-else

Use braces {…} to avoid

possible confusion.

if ( course_code == 1) {

if (code < 2)

printf("Mechanics\n");

else

printf("No course\n");

}

vs.

If ( course_code == 1) {

if (code < 2)

printf("Mechanics\n");

} else {

printf("No course\n");

}

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