Question

C programming

1 String Merging

Write a program that reads two strings s1 and s2 from the keyboard and merges them to a string s3. Strings s1 and s2 are statically allocated whereas s3 is dynamically allocated to fit exactly s1 and s2. The two original strings are no longer than 100 characters long. Use the following function to merge the two strings. char *stringMerge(char s1[], char s2 []);

Example:

Enter the first string: Hello world

Enter the first string: This is my first program

Hello worldThis is my first program

Answer 1

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

char *stringMerge(char s1[], char s2 []){
    int length1 = strlen(s1);
    int length2 = strlen(s2);
    int i = 0, j = 0, k = 0;
    char* result = (char*) malloc(sizeof(char)*(length1+length2+1));
    while(i<length1){
        result[k++] = s1[i++];
    }
    while(j<length2){
        result[k++] = s2[j++];
    }
    result[k] = '\0';
    return result;
}

int main()
{
    char s1[100], s2[100];
    char* result;
    
    printf("Enter the first string: ");
    scanf("%[^\n]%*c", s1);
    
    printf("Enter the second string: ");
    scanf("%[^\n]%*c", s2);
    
    result = stringMerge(s1,s2);
    
    printf("%s",result);
    
    return 0;
}