#include<stdio.h>
#include<conio.h>
int stlen(char str[50])
{
int len = 0;
while(str[len]!=’\0′)
len++;
len–;
return len;
}
void stcat(char str1[50], char str2[50])
{
int i = 0,len = 0;
while(str1[len]!=’\0′)
len++;
while(str2[i]!=’\0′)
{
str1[len] = str2[i];
i++;
len++;
}
str1[len] = ‘\0′;
}
void main()
{
char str1[50], str2[50], str3[50], temp[50];
int len1, len2, len3, i, j, match, k;
clrscr();
printf(“\n\n\t ENTER A SENTENCE…: “);
gets(str1);
len1 = stlen(str1);
printf(“\n\n\t ENTER A STRING WHICH YOU WANT TO DELETE…: “);
gets(str2);
len2 = stlen(str2);
printf(“\n\n\t ENTER A NEW STRING WHICH YOU WANT TO INSERT …: “);
gets(str3);
len3 = stlen(str3);
for(i=0;i<=len1;i++)
{
match = 1;
for(j=0;j<=len2;j++)
if(str2[j]!=str1[i+j])
{
match = 0;
break;
}
if(match)
{
for(k=0,j=i+len2+1;j<=len1;j++,k++)
temp[k] = str1[j];
temp[k] = ‘\0′;
for(j=0;j<=len3;j++)
str1[i+j] = str3[j];
str1[i+j] = ‘\0′;
stcat(str1,temp);
len1 = len1 – len2 +len3;
i = i + j;
}
}
printf(“\n\n\t OUTPUT IS…: “);
puts(str1);
getch();
}
Download exe and source code here.