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I would like to know how to store a value in a buffer in C.
One function counts the time and store it in a special place in buffer for a project. For ex project 2 save time in buffer position 2. This thing works fine, but then i would like to add a new time to project 2, but this override the old value.
Question: How can I save the old value, and then write again to the same position in the buffer. I would like to add this times in total.
I have seen some ex with using malloc(), or is there some easier way to do this.
I couldn't find any good example how to do this.
Thanks for any help.
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- void main(void){
- unsigned int TimerBuffer[40];
- unsigned int project;
- project=1;
- //double value;
- while (project!=0)
- {
- printf("Project number \n", project);
- scanf_s("%d",&project);
- Berakna_Tid(TimerBuffer, project); // Count time
- Sortering(TimerBuffer, project); // Sort
- }
- }
- void Berakna_Tid(unsigned int TimerBuffer[], unsigned int project)
- {
- time_t start_time;
- time_t stop_time;
- double value;
- int e;
- printf( "Type the Enter key to START timing.\n");
- while(getchar()!='\n');
- start_time=time(NULL);
- printf( "Type the Enter key to STOP timing.\n");
- while(getchar()!='\n');
- stop_time=time(NULL) ;
- e=difftime( stop_time,start_time); // /60 for minutes
- printf( "Elapsed time: %d minutes.\n" ,e) ;
- value=e;
- switch (project)
- {
- case 1:
- TimerBuffer[1] = value;
- break;
- case 2:
- TimerBuffer[2] = value;
- break;
- case 3:
- TimerBuffer[3] = value;
- break;
- }
- //project=0;
- }
- unsigned int Sortering(unsigned int TimerBuffer[], unsigned int project)
- {
- int sum=0;
- unsigned int temp;
- switch (project)
- {
- case 1:
- //TimerBuffer[1] = value;
- break;
- case 2:
- //TimerBuffer[2] = value;
- sum=TimerBuffer[2] ;
- temp=TimerBuffer[2];
- return temp;
- break;
- case 3:
- //TimerBuffer[3] = value;
- break;
- }
- project=0;
- }
