Help em Strings

This is a discussion on Help em Strings within the C Programming forums, part of the General Programming Boards category; Boas tenho de fazer um exercício em que pede uma string ao utilizador e depois constroi uma nova string retirando ...

  1. #1
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    Help em Strings

    Boas

    tenho de fazer um exercício em que pede uma string ao utilizador e depois constroi uma nova string retirando a primeira letra e depois a ultima sucessivamente (de fora para dentro)

    exemplo Batatas -> Bsaatta

    já fiz muitas tentativas mas não estou a conseguir fazer isto (sou iniciado em c)

    o que tenho até agora é isto:
    Code:
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #define TAMANHO 60
    
    int main() {
      
        char nome[TAMANHO];
    	char nomeCodificado[TAMANHO];
    	int tamanho,i,d,j;
      
        printf("Indique um nome: ");
    	gets(nome);
    	tamanho = strlen(nome);
        d = tamanho;
        d=d-1;
        j=0;
        
        for(i=0; i<tamanho; i++){
               
        printf("entra ciclo\n i =%i ",i);
        
        
        nomeCodificado[i] = nome[i]; 
        printf("Pos: %i Copia : %c\n",i,nome[i]);
        printf("Pos: %i Escreve: %c\n",i,nomeCodificado[i] );  
        j=i+1;
        nomeCodificado[j] = nome[d];
        printf("Pos: %i Copia : %c\n",d,nome[d]);
        printf("Pos: %i Escreve: %c\n",j,nomeCodificado[j] );
        d--;
        }
        
        printf("Resultado: %s\n",nomeCodificado);
      
      system("PAUSE");	
      return 0;
    }
    podem dar uma ajuda?

  2. #2
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    You're going to have to post this in English if you want much help....

  3. #3
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    hi

    I have to do an exercise that asks the user to give a name "string" and then build a new string by removing the first letter and the last letter and so on..

    exemple
    Batata -> Bsaatta

    already made many attempts but I am not able to do this (I started at c)

    tanks

  4. #4
    and the Hat of Guessing tabstop's Avatar
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    So that's what you need to do then. Figure out the first letter, and put it somewhere. Then figure out the last letter, and put it somewhere. Move forward a space and backward a space from your previous positions to get the next ones.

  5. #5
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    sounds easy.

    But, is not somewhere, the new string is build from left to right,
    and in the second cycle the i uses the second position than is already used by j

    Code:
    for(i=0; i<tamanho; i++){
               
        printf("entra ciclo\n i =%i ",i);
        
        
        nomeCodificado[i] = nome[i]; 
        printf("Pos: %i Copia : %c\n",i,nome[i]);
        printf("Pos: %i Escreve: %c\n",i,nomeCodificado[i] );  
        j=i+1;
        nomeCodificado[j] = nome[d];
        printf("Pos: %i Copia : %c\n",d,nome[d]);
        printf("Pos: %i Escreve: %c\n",j,nomeCodificado[j] );
        d--;
        }

  6. #6
    and the Hat of Guessing tabstop's Avatar
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    You should probably keep track of where you are in your copied string then, instead of trying to use the same variable that's being used for something else.

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