what is the value of null in c
Null pointer In C, two null pointers of any type are guaranteed to compare equal.[1] The preprocessor macro NULL is defined as an implementation-defined null pointer constant,[2] which in C99 can be portably expressed as the integer value 0 converted implicitly or explicitly to the type void* (pointer to void).[3] The C standard does not say that the null pointer is the same as the pointer to memory addressÂ 0, though that may be the case in practice. Dereferencing a null pointer is undefined behavior in C, and a conforming implementation is allowed to assume that any pointer that is dereferenced is not null.
Nullification Crisis On July 14, 1832, before Calhoun had resigned the Vice Presidency to run for the Senate where he could more effectively defend nullification,[4] Jackson signed into law the Tariff of 1832. This compromise tariff received the support of most northerners and half of the southerners in Congress.[5] The reductions were too little for South Carolina, and on November 24, 1832, a state convention adopted the Ordinance of Nullification, which declared that the Tariffs of 1828 and 1832 were unconstitutional and unenforceable in South Carolina after February 1, 1833. The state initiated military preparations to resist anticipated federal enforcement.[6] On March 1, 1833, Congress passed both the Force Bill—authorizing the President to use military forces against South Carolina—and a new negotiated tariff, the Compromise Tariff of 1833, which was satisfactory to South Carolina. The South Carolina convention reconvened and repealed its Nullification Ordinance on March 15, 1833, but three days later nullified the Force Bill as a symbolic gesture to maintain its principles.