|
| Key ANSI-C
|
| Command w/ Example | Comment |
|---|---|
| #include "sdba.h" #include <stdio.h> | Import info (e.g. data, functions) fr other files |
| #define MB 256 | Replace MB everywhere with 256 |
| #if TEST==1 #elif TEST==2 #endif | Compile only part of code |
| Data Types | Format | Flow | Streams |
|---|---|---|---|
| char abc; long int k; double x; char bb[MB]; struct Mi mi; | %c || %d %ld %lf %s ?? | while(k<MB){} if(){} else{ } | stdin stdout stderr |
| char *ptr; | for(k=0;k<MB;k++){ } |
| library | Function w/ Example | Comment |
|---|---|---|
| <stdio.h> | FILE *fi=fopen("in.txt","r"); | Open file to read |
| <stdio.h> | FILE *fo=fopen("out.txt","w"); | Open file to write |
| <stdio.h> | fgets(bb,MB,fin); | input: string (line of text ended by ␍) |
| <stdio.h> | fscanf(fi,"%ld,%lf",&k,&x); | input: 2 numbers (fixed, float) |
| <stdio.h> | fprintf(fo,"k=%ld, x=%lf",k,x); | output: anything/where |
| <stdio.h> | fclose(fi); fclose(fo); | close file streams |
| <string.h> | ptr=strtok(bb,","); ptr=strtok(NULL,","); | Parse a string: 1st call Parse a string: following calls |
| <stdlib.h> | j=atod(bb); || j=atod(ptr); | Convert string → integer (fixed dec.) |
| <stdlib.h> | x=atof(bb); || x=atof(ptr); | Convert string → Real number (float dec.) |
| <stdlib.h> | ptr=calloc(MB,sizeof(char)); | memory reserve |
| <stdlib.h> | free(ptr); | memory release |
| Compile | gcc -c -Wall -g main.c | Gnu DeBug (Step) | gdb m.exe
b main r display var n |
| Link | gcc -o m.exe main.o supp.o | ||
| Run | m.exe |