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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. int main() {
  5.     char name[100];
  6.     char id[20]; 
  7.     char result[150];
  8.  
  9.     printf("Enter your Name: ");
  10.     gets(name);
  11.  
  12.     printf("Enter your ID: ");
  13.     gets(id);
  14.  
  15.     // Concatenate ID and Name → result = id + space + name
  16.     strcpy(result, id);      // Copy ID to result
  17.     strcat(result, " ");     // Add space
  18.     strcat(result, name);    // Add Name
  19.  
  20.     printf("After Concatenation: %s\n", result);
  21.  
  22.     return 0;
  23. }
Success #stdin #stdout 0s 5320KB
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stdin
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MD. TAHMIR AMIN KHAN
2243081020
stdout
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Enter your Name: Enter your ID: After Concatenation: 2243081020 MD. TAHMIR AMIN KHAN
https://ideone.com/JbUAeV
language:
C (gcc 8.3)
created:
12 hours ago
visibility:
public

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