Week 9 _unsigned int size()

unsigned int Queue::size() {
    unsigned int size=0;
    Node* n = _head;
    if(!isEmpty()){
        size =1;
        while(n!=_tail) {
            size++;
            n = n->_next;
        }
    }
    return size;
}

Week 9_int& operator[](unsigned int index)

int& Queue::operator[] (unsigned int index){
     unsigned int size = this->size();
     Node* idx = _head;
     for(int i=0; i<int(index%size); i++){
         idx = idx->_next;
     }
     return idx->_data;
}

Week13_Display the environment variable path

#include <iostream>
using namespace std;

int main(int argc, char* argv[], char* env[]) {
    int len = strlen(env[0]);
    int pos = 0;
    int i=0;
    while(env[0][i] != '='){
        i++;
    }
    for(pos = i+1;pos<len;pos++){
        cout <<env[0][pos];
    }
    cout<<endl;
    return 0;
}

Week13_StrCat function - Concatenate optional strings

#include <iostream>
#include <cstdarg>
#include <string.h>
using namespace std;

char* StrCat(char* des, char* src1, ...);
int main() {
    char str[500] = "Fred";
    StrCat(str, "Soly", "Moly", 0);
    cout << str << endl;
    return 0;
}

char* StrCat(char* des,char* src1, ...) {
    strcat(des, src1);
    va_list varg;
    va_start(varg, src1);
    char* i =va_arg(varg, char*);
    while(i!=0) {
        strcat(des, i);
        i = va_arg(varg, char*);
    }
    va_end(varg);
    return des;
}

output is :
FredSolyMoly

Week11_prnBitOneLn(unsigned int Val)

Writing print bit function in one line as follows:

void prnBitsOneLn(unsigned int Val){
  for(unsigned int bitNo = sizeof(Val)*8; bitNo > 0; printf("%d", !!(Val&(1<<(bitNo-1)))),bitNo --);
}

Week11_void bitDump(void* memAddress, unsigned int memSize)

By given memory address and the size, output what the given memory has on the screen:

void bitDump(void* memAddress, unsigned int memSize) {
    unsigned char* p = (unsigned char*) memAddress;
    int i;
    for (i=0; i < memSize; i++) {
        unsigned int n = 1 << (sizeof(p)*8 -1);
        while(n) {
            printf("%c", !!(p[i] && n));
            n = n >> 1;
        }
    }//end forloop
}

Week11_char *bits(unsigned int Val)

Output bits as a string:

char *bits(unsigned int Val){
// write the above function so it works like this:
// cout<<bits(2345)<<endl;
    char* bitstr = new char[sizeof(Val)*8];
    unsigned int m = 1 << (sizeof(Val)*8 - 1);
    int i =0;
    while (m) {
        bitstr[i] = 48 + (int)!!(Val & m);
        m = m >>1;
        i++;
    }
    bitstr[i]='\0';
    return bitstr;  
}

Week11_setBit(unsigned int val, unsigned int bitNo, bool bitVal)

Sets the "bitNo" bit of val to the "bitVal" value:
 
unsigned int setBit(unsigned int val, unsigned int bitNo, bool bitVal){
    if(bitVal) {
        val = val | (1 << bitNo);
    }
    else {
        val = val & ~(1 << bitNo);
    }
    return val;
}

Starting

I am very excited on creating my blog for the first time. I will record every progress and share my experience in software development here and look forward to rapid growth.