diff --git a/basicmbr.cc b/basicmbr.cc
index c266e39..e09b0e9 100644
--- a/basicmbr.cc
+++ b/basicmbr.cc
@@ -140,7 +140,7 @@ BasicMBRData & BasicMBRData::operator=(const BasicMBRData & orig) {
 // Read data from MBR. Returns 1 if read was successful (even if the
 // data isn't a valid MBR), 0 if the read failed.
 int BasicMBRData::ReadMBRData(const string & deviceFilename) {
-   int allOK = 1;
+   int allOK;
 
    if (myDisk == NULL) {
       myDisk = new DiskIO;
@@ -355,7 +355,7 @@ int BasicMBRData::ReadLogicalParts(uint64_t extendedStart, int partNum) {
 // MBR itself and any defined logical partitions, provided there's an
 // MBR extended partition.
 int BasicMBRData::WriteMBRData(void) {
-   int allOK = 1;
+   int allOK;
 
    if (myDisk != NULL) {
       if (myDisk->OpenForWrite() != 0) {
@@ -372,7 +372,7 @@ int BasicMBRData::WriteMBRData(void) {
 // Save the MBR data to a file. This writes both the
 // MBR itself and any defined logical partitions.
 int BasicMBRData::WriteMBRData(DiskIO *theDisk) {
-   int i, j, partNum, next, allOK = 1, moreLogicals = 0;
+   int i, j, partNum, next, allOK, moreLogicals = 0;
    uint64_t extFirstLBA = 0;
    uint64_t writeEbrTo; // 64-bit because we support extended in 2-4TiB range
    TempMBR tempMBR;
@@ -948,7 +948,7 @@ int BasicMBRData::SpaceBeforeAllLogicals(void) {
 // primary status. Also does NOT consider partition order; there
 // can be gaps and it will still be considered legal.
 int BasicMBRData::IsLegal(void) {
-   int allOK = 1;
+   int allOK;
 
    allOK = (FindOverlaps() == 0);
    allOK = (allOK && (NumPrimaries() <= 4));
@@ -1055,7 +1055,7 @@ void BasicMBRData::MakePart(int num, uint64_t start, uint64_t length, int type,
 // Set the partition's type code.
 // Returns 1 if successful, 0 if not (invalid partition number)
 int BasicMBRData::SetPartType(int num, int type) {
-   int allOK = 1;
+   int allOK;
 
    if ((num >= 0) && (num < MAX_MBR_PARTS)) {
       if (partitions[num].GetLengthLBA() != UINT32_C(0)) {
@@ -1308,7 +1308,7 @@ void BasicMBRData::MakeItLegal(void) {
 // entries (primary space).
 // Returns the number of partitions moved.
 int BasicMBRData::RemoveLogicalsFromFirstFour(void) {
-   int i, j = 4, numMoved = 0, swapped = 0;
+   int i, j, numMoved = 0, swapped = 0;
    MBRPart temp;
 
    for (i = 0; i < 4; i++) {
diff --git a/bsd.cc b/bsd.cc
index f487f18..1ef7c81 100644
--- a/bsd.cc
+++ b/bsd.cc
@@ -44,7 +44,7 @@ BSDData::~BSDData(void) {
 // just opens the device file and then calls an overloaded function to do
 // the bulk of the work. Returns 1 on success, 0 on failure.
 int BSDData::ReadBSDData(const string & device, uint64_t startSector, uint64_t endSector) {
-   int allOK = 1;
+   int allOK;
    DiskIO myDisk;
 
    if (device != "") {
@@ -64,7 +64,7 @@ int BSDData::ReadBSDData(const string & device, uint64_t startSector, uint64_t e
 // Load the BSD disklabel data from an already-opened disk
 // file, starting with the specified sector number.
 int BSDData::ReadBSDData(DiskIO *theDisk, uint64_t startSector, uint64_t endSector) {
-   int allOK = 1;
+   int allOK;
    int i, foundSig = 0, bigEnd = 0;
    int relative = 0; // assume absolute partition sector numbering
    uint8_t buffer[4096]; // I/O buffer
diff --git a/diskio-unix.cc b/diskio-unix.cc
index 4aefc6f..7780aeb 100644
--- a/diskio-unix.cc
+++ b/diskio-unix.cc
@@ -376,7 +376,7 @@ int DiskIO::Read(void* buffer, int numBytes) {
 // size with the number of bytes read.
 // Returns the number of bytes written.
 int DiskIO::Write(void* buffer, int numBytes) {
-   int blockSize = 512, i, numBlocks, retval = 0;
+   int blockSize, i, numBlocks, retval = 0;
    char* tempSpace;
 
    // If disk isn't open, try to open it....
diff --git a/gpt.cc b/gpt.cc
index 842dfb1..51d482c 100644
--- a/gpt.cc
+++ b/gpt.cc
@@ -582,7 +582,7 @@ int GPTData::CheckHeaderCRC(struct GPTHeader* header, int warn) {
 // byte order and then undoes that reversal.)
 void GPTData::RecomputeCRCs(void) {
    uint32_t crc, hSize;
-   int littleEndian = 1;
+   int littleEndian;
 
    // If the header size is bigger than the GPT header data structure, reset it;
    // otherwise, set both header sizes to whatever the main one is....
@@ -2144,7 +2144,6 @@ int GPTData::Align(uint64_t* sector) {
       // Check to see that every sector between the earlier one and the
       // requested one is clear, and that it's not too early....
       if (earlier >= mainHeader.firstUsableLBA) {
-         sectorOK = 1;
          testSector = earlier;
          do {
             sectorOK = IsFree(testSector++);
@@ -2157,7 +2156,6 @@ int GPTData::Align(uint64_t* sector) {
 
       // If couldn't move the sector earlier, try to move it later instead....
       if ((sectorOK != 1) && (later <= mainHeader.lastUsableLBA)) {
-         sectorOK = 1;
          testSector = later;
          do {
             sectorOK = IsFree(testSector--);
@@ -2454,7 +2452,7 @@ void GPTData::SetAlignment(uint32_t n) {
 // is used on big disks (as safety for Advanced Format drives).
 // Returns the computed alignment value.
 uint32_t GPTData::ComputeAlignment(void) {
-   uint32_t i = 0, found, exponent = 31;
+   uint32_t i = 0, found, exponent;
    uint32_t align = DEFAULT_ALIGNMENT;
 
    if (blockSize > 0)
diff --git a/gptcurses.cc b/gptcurses.cc
index 71aa734..1fbaad2 100644
--- a/gptcurses.cc
+++ b/gptcurses.cc
@@ -437,7 +437,6 @@ void GPTDataCurses::MakeNewPart(void) {
    move(LINES - 4, 0);
    clrtobot();
    while ((newFirstLBA < currentSpace->firstLBA) || (newFirstLBA > currentSpace->lastLBA)) {
-      newFirstLBA = currentSpace->firstLBA;
       move(LINES - 4, 0);
       clrtoeol();
       newFirstLBA = currentSpace->firstLBA;
diff --git a/gpttext.cc b/gpttext.cc
index ea34444..505f006 100644
--- a/gpttext.cc
+++ b/gpttext.cc
@@ -251,7 +251,7 @@ void GPTDataTextUI::CreatePartition(void) {
       } while (IsFree(sector) == 0);
       lastBlock = sector;
 
-      firstFreePart = GPTData::CreatePartition(partNum, firstBlock, lastBlock);
+      GPTData::CreatePartition(partNum, firstBlock, lastBlock);
       partitions[partNum].ChangeType();
       partitions[partNum].SetDefaultDescription();
    } else {
diff --git a/support.cc b/support.cc
index 88c130b..99fdffe 100644
--- a/support.cc
+++ b/support.cc
@@ -154,7 +154,7 @@ uint64_t GetSectorNum(uint64_t low, uint64_t high, uint64_t def, uint64_t sSize,
 // compiled with GCC (and so the value is rejected), whereas when VC++
 // is used, the default value is returned.
 uint64_t IeeeToInt(string inValue, uint64_t sSize, uint64_t low, uint64_t high, uint64_t def) {
-   uint64_t response = def, bytesPerUnit = 1, mult = 1, divide = 1;
+   uint64_t response = def, bytesPerUnit, mult = 1, divide = 1;
    size_t foundAt = 0;
    char suffix = ' ', plusFlag = ' ';
    string suffixes = "KMGTPE";