How to read and print the resulting array with fgets and printf("%s")?

Question

I know it is a simple question but I am stuck.The code is:

#include <stdio.h>
#define MAX_SIZE 1025
#define NUM 64
int main(){
    int mem_size;
    char types[NUM];
    char values[MAX_SIZE];

    fgets(types,NUM,stdin);
    printf("%s",types);
    fgets(values,MAX_SIZE,stdin);
    printf("%s",values);
    scanf("%d",&mem_size);
    printf("%d",mem_size);

    return 0;
}

Although I want the results after I type and hit enter, the flow is: I need to enter all the fgets and scanf stuff and it correctly prints the desired results. What is the problem? Please help.

What do you expect this code to do? What does it actually do? What input do you give it? — interjay, Jan 05 '14 at 15:05
@interjacy I want to write someting to console then hit enter and then want to see the what I currently typed. — mualloc, Jan 05 '14 at 15:10
Problem is it shows the results after I enter mem_size altogethger simultaneously,not one by one. — mualloc, Jan 05 '14 at 15:21

score 1 · Accepted Answer · edited May 23 '17 at 12:15

1

OP: "Problem is it shows the results after I enter mem_size altogether simultaneously, not one by one"

Some systems to not "flush" the stdout output promptly even with a \n. The output that was seen came out just before the program ended, which forced the buffered stdout to the console.

Either add fflush(stdout) after each printf() or change your system's settings (varies with environment) to promptly send stdout to the console.

Ref:

printf not printing on console

edited May 23 '17 at 12:15

Community

1
1

answered Jan 05 '14 at 17:28

chux - Reinstate Monica

143,097
13
135
256

@Murat Mataracı it was the "Problem is it shows the results ..." comment that made your question sensible. The post contained the 1) what was done 2) statement about what was wanted but it was _missing_ 3) what happened - the comment fixed that. Suggest future posts contain 1) the question 2) code 3) data in 4) data out 5) expected result. Also, after some time - an hour, a day, if an answer works well for you, accept the best one. – chux - Reinstate Monica Jan 05 '14 at 18:10

How to read and print the resulting array with fgets and printf("%s")?

1 Answers1