Write a C program that uses functions
to perform the following operations:
- To insert a sub-string in to a given main string from a given position.
- To delete n Characters from a given position in a given string.
i) To insert a sub-string in to a given main string from a given position.
Algorithm:
Step 1: Start Step 2: read main string and sub string Step 3: find the length of main string(r) Step 4: find length of sub string(n) Step 5: copy main string into sub string Step 6: read the position to insert the sub string(p) Step 7: copy sub string into main string from position p - 1 Step 8: copy temporary string into main string from position p + n - 1 Step 9: print the strings Step 10: Stop
Program:
#include<stdio.h> #include<conio.h> #include<string.h> void main() { char str1[20], str2[20]; int l1, l2, n, i; clrscr(); puts("Enter the string 1\n"); gets(str1); l1 = strlen(str1); puts("Enter the string 2\n"); gets(str2); l2 = strlen(str2); printf("Enter the position where the string is to be inserted\n"); scanf("%d", &n); for(i = n; i < l1; i++) { str1[i + l2] = str1[i]; } for(i = 0; i < l2; i++) { str1[n + i] = str2[i]; } str2[l2 + 1] = '\0'; printf("After inserting the string is %s", str1); getch(); }
Input & Output:
Enter the string 1 sachin Enter the string 2 tendulkar Enter the position where the string is to be inserted 4 After inserting the string is sachtendulkarin
ii) To delete n Characters from a given position in a given string.
Algorithm:
Step 1: Start Step 2: read string Step 3: find the length of the string Step 4: read the value of number of characters to be deleted and positioned Step 5: string copy part of string from position to end, and (position + number of characters to end) Step 6: Stop
Program:
#include<stdio.h> #include<conio.h> #include<string.h> void main() { char str[20]; int i, n, l, pos; clrscr(); puts("Enter the string\n"); gets(str); printf("Enter the position where the characters are to be deleted\n"); scanf("%d", &pos); printf("Enter the number of characters to be deleted\n"); scanf("%d", &n); l = strlen(str); for(i = pos + n; i < l; i++) { str[i - n] = str[i]; } str[i - n] = '\0'; printf("The string is %s", str); getch(); }
Input & Output:
Enter the string sachin Enter the position where characters are to be deleted 2 Enter the number of characters to be deleted 2 The string is sain
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UpdatedDec 25, 2014
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