-1
void ex51(char *nome_ficheiro){//escrever e criar um ficheiro novo.
char frase[100];
printf("Introduza o texto que quer escrever neste ficheiro:\n");
scanf("%s",frase);
FILE *fp=fopen(nome_ficheiro,"w");
if(fp==NULL){
printf("Error!!!\n");
}else{
fprintf(fp,"%s",frase);
}
fclose(fp);
}
Whenever I give space or enter it only keeps the first word, I tried to use gets() to solve the problem, but gets() doesn’t work, causes the program to end soon.
4
The scanf has a format for reading characters, so it reads everything typed up to a specific value.
scanf("%[^\n]", var); // irá ler tudo que estiver antes do \n (quebra de linha)
As his String has a fixed size, you can use a constant to indicate the maximum size you want to read.
scanf("%100[^\n], var); // irá ler os antes de \n com um limite de 100
Or you can directly read the characters, but do not recommend.
scanf("%100c", var); // lê os caracteres até um limite de 100
void ex51(char *nome_ficheiro){
char frase[100];
printf("Introduza o texto que quer escrever neste ficheiro:\n");
scanf("%100[^\n]",frase); // faz a leitura da linha
FILE *fp=fopen(nome_ficheiro,"w");
if(fp==NULL){
printf("Error!!!\n");
}else{
fprintf(fp,"%s",frase);
}
fclose(fp);
}
2
Use fgets to read a line. Do not use gets, is grounds for dismissal for just cause.
#include <stdio.h>
void ex51(char *nome_ficheiro)
{
char frase[100];
printf("Introduza o texto que quer escrever neste ficheiro:\n");
if (fgets(frase, 100, stdin) == NULL)
{
printf("erro,nao foi possivel ler o texto");
return;
}
FILE* fp=fopen(nome_ficheiro,"w");
if (fp == NULL)
{
printf("Error!!!\n");
}
else
{
fprintf(fp,"%s",frase);
}
fclose(fp);
}
int main()
{
ex51("xxx");
}
fgets() causes the program not to read the text (as no gets()) to simply skip, but I will try to edit the program in order to take the limit, and then I will use fgets() to see if it already gives.
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It didn’t work, keep saving only until I give a space or enter. (i.e., save a character or a word)
– pp fernandes
@ppfernandes, I left a link at the end of the code with the example working, a look and compare with your code, it may be that there is some logic error in it.
– Brumazzi DB