01: #include <stdio.h>
02:
03: float abs(float x); //absolute
04: float getfloat(void);
05:
06: int main(void)
07: {
08: float x, z;
09:
10: printf("Input: ");
11: x = getfloat();
12: z = abs(x);
13: printf("|%f| = %f", x, z);
14:
15: return 0;
16: }
17:
18: float abs(float x)
19: {
20: if(x >= 0) return x;
21: else return -x;
22: }
23:
24: float getfloat(void)
25: {
26: float x;
27: scanf("%f", &x);
28: return x;
29: }