printf - C programming help, how to use the fopen and the fprintf functions in C to save the given output in a text file? -

-

last time worked on code, working fine. wanted output saved text file (anything printed through fprintf()). now, when try run code again, not save output in given text file draftday.txt. appreciated.

#include <stdio.h> #include <conio.h> #include <cstdlib>  int main() {      struct date     {         int day;         int month;         int year;     };      struct details     {         char name[50];         int price;         int code;         int qty;         struct date mfg;     };      struct details item[50];     int n,i;      getch();      fflush(stdin);     printf("enter number of items:");     scanf("%d",&n);           for(i=0;i<n;i++)     {         fflush(stdin);         printf("item name:");         scanf("%[^\n]",item[i].name);          fflush(stdin);         printf("item code:");         scanf("%d",&item[i].code);          fflush(stdin);         printf("quantity:");         scanf("%d",&item[i].qty);          fflush(stdin);         printf("price:");         scanf("%d",&item[i].price);          fflush(stdin);         printf("manufacturing date(dd-mm-yyyy):");         scanf("%d-%d-%d",&item[i].mfg.day,&item[i].mfg.month,&item[i].mfg.year);     }      {     file *fptr;     fptr=(fopen("draftday.txt","w"));     if(fptr==null){        printf("error!");        exit(1);     }      fprintf(fptr,"             *****  inventory *****\n\n\n"                  "------------------------------------------------------------------\n\n"                  "s.n.|    name           |   code   |  quantity |  price  |mfg.date\n\n"                  "------------------------------------------------------------------\n\n");       for(i=0;i<n;i++){         fprintf(fptr, "%d     %-15s        %-d          %-5d     %-5d       %d/%d/%d\n",i,item[i].name,item[i].code,item[i].qty,item[i].price,                 item[i].mfg.day,item[i].mfg.month,item[i].mfg.year);     }      fclose(fptr);     getch();     } }

i think forgot put for loop around:

        fprintf(fptr, "%d     %-15s        %-d          %-5d     %-5d     %d/%d/%d\n",i+1,item[i].name,item[i].code,item[i].qty,item[i].price,                 item[i].mfg.day,item[i].mfg.month,item[i].mfg.year);

try:

     for(i=0;i<n;i++)      {         fprintf(fptr, "%d     %-15s        %-d          %-5d     %-5d     %d/%d/%d\n",i+1,item[i].name,item[i].code,item[i].qty,item[i].price,                 item[i].mfg.day,item[i].mfg.month,item[i].mfg.year);      }

also, opening output file in append mode. not sure meant that. if not, change

fptr=(fopen("draftday.txt","a"));

to

fptr=(fopen("draftday.txt","w"));

Comments

Post a Comment

Popular posts from this blog

java - Plugin org.apache.maven.plugins:maven-install-plugin:2.4 or one of its dependencies could not be resolved -

-
i getting error message , further 1 here: failed read artifact descriptor org.apache.maven.plugins:maven-install-plugin:jar:2.4: even though when go .m2 repository path c:\users\a591024.m2\repository\org\apache\maven\plugins\maven-resources-plugin\2.4 the maven-resources-plugin-2.4.jar file there , maven-resources-plugin-2.4.pom there. have tried delete .m2 repository no luck. far maven not build project desperately need to. any ideas? it seems proxy issue please aad following in setting.xml grabbing lan setting , proxy information. <proxies> <proxy> <id>proxy</id> <active>true</active> <protocol>http</protocol> <host>hostname</host> <port>port</port> </proxy> </proxies> this frequent issue, please see below link well. plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or 1 of dependencies not resolved maven: failed ret...
Read more

Round ImageView Android -

-
Image
i working on android application in doing rounded image view. working fine images, images 160x120 resolution shows oval shaped. code custom imageview given below, please me out here: public class roundimage extends drawable { private final bitmap mbitmap; private final paint mpaint; private final rectf mrectf; private final int mbitmapwidth; private final int mbitmapheight; public roundimage(bitmap bitmap) { mbitmap = bitmap; mrectf = new rectf(); mpaint = new paint(); mpaint.setantialias(true); mpaint.setdither(true); final bitmapshader shader = new bitmapshader(bitmap, shader.tilemode.clamp, shader.tilemode.clamp); mpaint.setshader(shader); mbitmapwidth = mbitmap.getwidth(); mbitmapheight = mbitmap.getheight(); } @override public void draw(canvas canvas) { canvas.drawoval(mrectf, mpaint); } @override protected void onboundschange(rect bound...
Read more

How can I utilize Yahoo Weather API in android -

-
Image
i want develop app using yahoo weather api android. want current , forecast weather details. i have tried different sources (e.g.: https://github.com/survivingwithandroid/weatherlib , getting error weatherlib api android , unable execute activity in android weatherlib ) , getting different errors m unable resplve. there can proper tutorial or guide! error: -17 08:50:48.961 3168-3168/com.survivingwithandroid.weather e/androidruntime﹕ fatal exception: main process: com.survivingwithandroid.weather, pid: 3168 java.lang.runtimeexception: unable start activity componentinfo{com.survivingwithandroid.weather/com.survivingwithandroid.weather.mainactivity}: java.lang.nullpointerexception: attempt invoke interface method 'boolean java.util.list.isempty()' on null object reference @ android.app.activitythread.performlaunchactivity(activitythread.java:2298) @ android.app.activitythread.handlelaunchactivity(activitythread.java:2360) @ android.app.activi...
Read more