String Library Function Manual

#include <stdio.h>
int length (char *Name);
char copy (char *str1, char *str2);
char concatanation (char *str3, char *str4);
void compare (char*, char*);
void uppercase (char*);
void lowercase (char*);


int main ()
{
    printf("Enter String for Length:\n");
    char *Name;
    Name = malloc(1024);
    gets(Name);
    int result = length(Name);
    printf("The Length of Input String is: %d\n",result);

    printf("Enter 2 strings to Copy: \n");
    char str1[100];
    gets(str1);
    char* str2[100];
    gets(str2);
    copy(str1,str2);
    printf("Copy of String2 in String1: ");
    puts(str1);

    printf("Enter 2 String for Concatanation: \n");
    char str3[100];
    gets(str3);
    char* str4[100];
    gets(str4);
    concatanation (str3,str4);
    printf("concatanation of String3 & String4 is: ");
    puts(str3);

    printf("Enter 2 Strings for Comparison: \n");
    char arr1[100];
    char arr2[100];
    gets(arr1);
    gets(arr2);
    compare(arr1,arr2);

    printf("Enter a Small case String for Capital: \n");
    char a[100];
    gets(a);
    uppercase(a);

    printf("Enter a Capital case String for Capital: \n");
    char b[100];
    gets(b);
    lowercase(b);

    return 0;
}

 int length (char *Name)
{
    int i,result;
    for(i=0; Name[i] != '\0'; i++)
    result = i;
    result ++;

    return result;
}

char copy (char* str1, char* str2)
{
    int i;
    for(i=0;str2[i] != '\0' ;i++)
    {
        str1[i] = str2[i];
    }
    str1[i] = '\0';

    return str1;

}

char concatanation (char *str3, char *str4)
{
    int i = length(str3);
    int j;
    str3[i] = ' ';
    for(i=i+1,j=0; str4[j] != '\0'; i++,j++)
    {
        str3[i] = str4[j];
    }

    return str3;
}

void compare (char *arr1, char *arr2)
{
    int i,len = 0, len1 = 0,x;
    while(arr1[len])
    {
        len++;
    }
    while(arr2[len1])
    {
       len1++;
    }
    for(i=0;i<=len;i++)
        {
            if(arr1[i] != arr2[i] )
            {
                x = arr1[i] - arr2[i];
                if(x>0)
                {
                    printf("1\n");
                }
                else
                {
                    printf("-1\n");
                }
                break;
            }
            if(i == len)
            {
                printf("0\n");
            }

        }

}

void uppercase (char* a)
{

    int i;
    for(i=0;a[i] != '\0';i++)
    {
        if(a[i]>='a' &&  a[i]<='z');
        {
            a[i] = a[i]-32;
        }
        printf("%c",a[i]);
    }
    printf("\n");


}

void lowercase (char* b)
{



    int i;
    for(i=0;b[i] != '\0';i++)
    {
        if(b[i]>='A' &&  b[i]<='Z');
        {
            b[i] = b[i]+32;
        }

        printf("%c",b[i]);
    }
    printf("\n");


}